deleted file mode 100644
--- a/netwerk/test/browser/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-BROWSER_CHROME_MANIFESTS += ['browser.ini']
-

deleted file mode 100644
--- a/netwerk/test/mochitests/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-

--- a/netwerk/test/moz.build
+++ b/netwerk/test/moz.build
@@ -1,18 +1,20 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_TOOL_DIRS += ['httpserver', 'browser', 'mochitests']
+TEST_TOOL_DIRS += ['httpserver']
 
 FAIL_ON_WARNINGS = True
 
+BROWSER_CHROME_MANIFESTS += ['browser/browser.ini']
+MOCHITEST_MANIFESTS += ['mochitests/mochitest.ini']
 XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']
 
 # FIXME/bug 575918: out-of-process xpcshell is broken on OS X
 if CONFIG['OS_ARCH'] != 'Darwin':
     XPCSHELL_TESTS_MANIFESTS += ['unit_ipc/xpcshell.ini']
 
 SIMPLE_PROGRAMS = [
     'PropertiesTest',

--- a/toolkit/components/aboutmemory/moz.build
+++ b/toolkit/components/aboutmemory/moz.build
@@ -1,9 +1,9 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+MOCHITEST_CHROME_MANIFESTS += ['tests/chrome.ini']
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/components/aboutmemory/tests/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

--- a/toolkit/components/alerts/moz.build
+++ b/toolkit/components/alerts/moz.build
@@ -1,24 +1,24 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+MOCHITEST_MANIFESTS += ['test/mochitest.ini']
 
 XPIDL_SOURCES += [
     'nsIAlertsService.idl',
 ]
 
 XPIDL_MODULE = 'alerts'
 
 UNIFIED_SOURCES += [
     'nsAlertsService.cpp',
     'nsXULAlerts.cpp',
 ]
 
 include('/ipc/chromium/chromium-config.mozbuild')
 
 FINAL_LIBRARY = 'toolkitcomps'
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/components/alerts/test/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-

--- a/toolkit/components/autocomplete/moz.build
+++ b/toolkit/components/autocomplete/moz.build
@@ -1,15 +1,15 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+XPCSHELL_TESTS_MANIFESTS += ['tests/unit/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsIAutoCompleteController.idl',
     'nsIAutoCompleteInput.idl',
     'nsIAutoCompletePopup.idl',
     'nsIAutoCompleteResult.idl',
     'nsIAutoCompleteSearch.idl',
     'nsIAutoCompleteSimpleResult.idl',

deleted file mode 100644
--- a/toolkit/components/autocomplete/tests/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/components/captivedetect/moz.build
+++ b/toolkit/components/captivedetect/moz.build
@@ -1,15 +1,15 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+XPCSHELL_TESTS_MANIFESTS += ['test/unit/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsICaptivePortalDetector.idl',
 ]
 
 XPIDL_MODULE = 'captivedetect'
 
 EXTRA_COMPONENTS += [

deleted file mode 100644
--- a/toolkit/components/captivedetect/test/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/components/commandlines/moz.build
+++ b/toolkit/components/commandlines/moz.build
@@ -1,15 +1,20 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+XPCSHELL_TESTS_MANIFESTS += ['test/unit/xpcshell.ini']
+
+if CONFIG['OS_ARCH'] == 'WINNT':
+    XPCSHELL_TESTS_MANIFESTS += ['test/unit_win/xpcshell.ini']
+elif CONFIG['OS_ARCH'] != 'Darwin':
+    XPCSHELL_TESTS_MANIFESTS += ['test/unit_unix/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsICommandLine.idl',
     'nsICommandLineHandler.idl',
     'nsICommandLineRunner.idl',
     'nsICommandLineValidator.idl',
 ]
 

deleted file mode 100644
--- a/toolkit/components/commandlines/test/moz.build
+++ /dev/null
@@ -1,13 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']
-
-if CONFIG['OS_ARCH'] == 'WINNT':
-    XPCSHELL_TESTS_MANIFESTS += ['unit_win/xpcshell.ini']
-
-if CONFIG['OS_ARCH'] != 'WINNT' and CONFIG['OS_ARCH'] not in ('Darwin', 'OS2'):
-    XPCSHELL_TESTS_MANIFESTS += ['unit_unix/xpcshell.ini']

--- a/toolkit/components/console/moz.build
+++ b/toolkit/components/console/moz.build
@@ -1,14 +1,14 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+MOCHITEST_CHROME_MANIFESTS += ['tests/chrome.ini']
 
 EXTRA_COMPONENTS += [
     'jsconsole-clhandler.js',
     'jsconsole-clhandler.manifest',
 ]
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/components/console/tests/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

--- a/toolkit/components/contentprefs/moz.build
+++ b/toolkit/components/contentprefs/moz.build
@@ -1,15 +1,18 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+XPCSHELL_TESTS_MANIFESTS += [
+    'tests/unit/xpcshell.ini',
+    'tests/unit_cps2/xpcshell.ini',
+]
 
 EXTRA_COMPONENTS += [
     'nsContentPrefService.js',
     'nsContentPrefService.manifest',
 ]
 
 EXTRA_JS_MODULES += [
     'ContentPrefInstance.jsm',

deleted file mode 100644
--- a/toolkit/components/contentprefs/tests/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini', 'unit_cps2/xpcshell.ini']

--- a/toolkit/components/downloads/moz.build
+++ b/toolkit/components/downloads/moz.build
@@ -1,15 +1,19 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+XPCSHELL_TESTS_MANIFESTS += ['test/unit/xpcshell.ini']
+
+if not CONFIG['MOZ_JSDOWNLOADS']:
+    TEST_DIRS += ['test/browser']
+    XPCSHELL_TESTS_MANIFESTS += ['test/schema_migration/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsIApplicationReputation.idl',
     'nsIDownload.idl',
     'nsIDownloadManager.idl',
     'nsIDownloadManagerUI.idl',
     'nsIDownloadProgressListener.idl',
 ]

deleted file mode 100644
--- a/toolkit/components/downloads/test/moz.build
+++ /dev/null
@@ -1,11 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-if not CONFIG['MOZ_JSDOWNLOADS']:
-    TEST_DIRS += ['browser']
-    XPCSHELL_TESTS_MANIFESTS += ['schema_migration/xpcshell.ini']
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/components/feeds/moz.build
+++ b/toolkit/components/feeds/moz.build
@@ -1,15 +1,15 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+MOCHITEST_CHROME_MANIFESTS += ['test/chrome.ini']
 
 XPIDL_SOURCES += [
     'nsIFeed.idl',
     'nsIFeedContainer.idl',
     'nsIFeedElementBase.idl',
     'nsIFeedEntry.idl',
     'nsIFeedGenerator.idl',
     'nsIFeedListener.idl',

deleted file mode 100644
--- a/toolkit/components/feeds/test/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

--- a/toolkit/components/filepicker/moz.build
+++ b/toolkit/components/filepicker/moz.build
@@ -14,14 +14,14 @@ if CONFIG['MOZ_XUL'] and \
             'nsFileView.cpp',
         ]
         EXTRA_COMPONENTS += [
             'nsFilePicker.js',
         ]
         EXTRA_PP_COMPONENTS += [
             'nsFilePicker.manifest',
         ]
-        DIRS += [
-            'test',
+        XPCSHELL_TESTS_MANIFESTS += [
+            'test/unit/xpcshell.ini',
         ]
         FINAL_LIBRARY = 'xul'
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/components/filepicker/test/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/components/jsdownloads/moz.build
+++ b/toolkit/components/jsdownloads/moz.build
@@ -1,9 +1,11 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 DIRS += ['public', 'src']
-TEST_DIRS += ['test']
 
+TEST_DIRS += ['test/data']
+
+XPCSHELL_TESTS_MANIFESTS += ['test/unit/xpcshell.ini']

deleted file mode 100644
--- a/toolkit/components/jsdownloads/test/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-TEST_DIRS += ['data']
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/components/mediasniffer/moz.build
+++ b/toolkit/components/mediasniffer/moz.build
@@ -1,15 +1,15 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+XPCSHELL_TESTS_MANIFESTS += ['test/unit/xpcshell.ini']
 
 EXPORTS += [
     'nsMediaSniffer.h',
 ]
 
 UNIFIED_SOURCES += [
     'mp3sniff.c',
     'nsMediaSniffer.cpp',

deleted file mode 100644
--- a/toolkit/components/mediasniffer/test/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/components/microformats/moz.build
+++ b/toolkit/components/microformats/moz.build
@@ -1,12 +1,12 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+MOCHITEST_MANIFESTS += ['tests/mochitest.ini']
 
 EXTRA_JS_MODULES += [
     'Microformats.js',
 ]
 

deleted file mode 100644
--- a/toolkit/components/microformats/tests/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-

--- a/toolkit/components/osfile/moz.build
+++ b/toolkit/components/osfile/moz.build
@@ -3,14 +3,15 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 DIRS += [
     'modules',
 ]
 
-TEST_DIRS += ['tests']
+MOCHITEST_CHROME_MANIFESTS += ['tests/mochi/chrome.ini']
+XPCSHELL_TESTS_MANIFESTS += ['tests/xpcshell/xpcshell.ini']
 
 EXTRA_PP_JS_MODULES += [
     'osfile.jsm',
 ]
 

deleted file mode 100644
--- a/toolkit/components/osfile/tests/mochi/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

deleted file mode 100644
--- a/toolkit/components/osfile/tests/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-TEST_DIRS += ['mochi']
-
-XPCSHELL_TESTS_MANIFESTS += ['xpcshell/xpcshell.ini']

--- a/toolkit/components/passwordmgr/moz.build
+++ b/toolkit/components/passwordmgr/moz.build
@@ -1,15 +1,18 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+MOCHITEST_MANIFESTS += ['test/mochitest.ini']
+MOCHITEST_CHROME_MANIFESTS += ['test/chrome.ini']
+BROWSER_CHROME_MANIFESTS += ['test/browser/browser.ini']
+XPCSHELL_TESTS_MANIFESTS += ['test/unit/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsILoginInfo.idl',
     'nsILoginManager.idl',
     'nsILoginManagerCrypto.idl',
     'nsILoginManagerPrompter.idl',
     'nsILoginManagerStorage.idl',
     'nsILoginMetaInfo.idl',
@@ -29,9 +32,9 @@ EXTRA_PP_COMPONENTS += [
     'storage-mozStorage.js',
 ]
 
 EXTRA_JS_MODULES += [
     'InsecurePasswordUtils.jsm',
     'LoginManagerContent.jsm',
 ]
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/components/passwordmgr/test/moz.build
+++ /dev/null
@@ -1,13 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-
-BROWSER_CHROME_MANIFESTS += ['browser/browser.ini']

--- a/toolkit/components/prompts/moz.build
+++ b/toolkit/components/prompts/moz.build
@@ -1,10 +1,11 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 DIRS += ['src']
-TEST_DIRS += ['test']
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+MOCHITEST_MANIFESTS += ['test/mochitest.ini']
+
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/components/prompts/test/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-

--- a/toolkit/components/satchel/moz.build
+++ b/toolkit/components/satchel/moz.build
@@ -1,15 +1,18 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+TEST_DIRS += ['test/browser']
+
+MOCHITEST_MANIFESTS += ['test/mochitest.ini']
+XPCSHELL_TESTS_MANIFESTS += ['test/unit/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsIFormAutoComplete.idl',
     'nsIFormFillController.idl',
     'nsIFormHistory.idl',
     'nsIInputListAutoComplete.idl',
 ]
 
@@ -40,9 +43,9 @@ EXTRA_JS_MODULES += [
 ]
 
 EXTRA_PP_JS_MODULES += [
     'FormHistory.jsm',
 ]
 
 FINAL_LIBRARY = 'xul'
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/components/satchel/test/moz.build
+++ /dev/null
@@ -1,12 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-TEST_DIRS += ['browser']
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-

--- a/toolkit/components/search/moz.build
+++ b/toolkit/components/search/moz.build
@@ -1,15 +1,15 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+XPCSHELL_TESTS_MANIFESTS += ['tests/xpcshell/xpcshell.ini']
 
 EXTRA_COMPONENTS += [
     'nsSearchSuggestions.js',
     'toolkitsearch.manifest',
 ]
 
 EXTRA_PP_COMPONENTS += [
     'nsSearchService.js',

deleted file mode 100644
--- a/toolkit/components/search/tests/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['xpcshell/xpcshell.ini']

--- a/toolkit/components/social/moz.build
+++ b/toolkit/components/social/moz.build
@@ -1,17 +1,19 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+XPCSHELL_TESTS_MANIFESTS += ['test/xpcshell/xpcshell.ini']
 
 if CONFIG['MOZ_SOCIAL']:
+    BROWSER_CHROME_MANIFESTS += ['test/browser/browser.ini']
+
     # social is turned off for android
     EXTRA_JS_MODULES = [
         'FrameWorker.jsm',
         'FrameWorkerContent.js',
         'MessagePortBase.jsm',
         'MessagePortWorker.js',
         'MozSocialAPI.jsm',
         'SocialService.jsm',

deleted file mode 100644
--- a/toolkit/components/social/test/browser/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-if CONFIG['MOZ_SOCIAL']:
-    BROWSER_CHROME_MANIFESTS += ['browser.ini']

deleted file mode 100644
--- a/toolkit/components/social/test/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-TEST_DIRS += ['browser']
-
-XPCSHELL_TESTS_MANIFESTS += ['xpcshell/xpcshell.ini']

--- a/toolkit/components/startup/moz.build
+++ b/toolkit/components/startup/moz.build
@@ -1,22 +1,21 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 DIRS += ['public']
 
-TEST_DIRS += ['tests/browser']
-
 EXPORTS.mozilla += [
     'StartupTimeline.h',
 ]
 
+BROWSER_CHROME_MANIFESTS += ['tests/browser/browser.ini']
 XPCSHELL_TESTS_MANIFESTS += ['tests/unit/xpcshell.ini']
 
 UNIFIED_SOURCES += [
     'nsAppStartup.cpp',
     'StartupTimeline.cpp',
 ]
 
 if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'os2':

deleted file mode 100644
--- a/toolkit/components/startup/tests/browser/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-BROWSER_CHROME_MANIFESTS += ['browser.ini']
-

--- a/toolkit/components/telemetry/moz.build
+++ b/toolkit/components/telemetry/moz.build
@@ -1,15 +1,15 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+XPCSHELL_TESTS_MANIFESTS += ['tests/unit/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsITelemetry.idl',
 ]
 
 XPIDL_MODULE = 'telemetry'
 
 EXPORTS.mozilla += [

deleted file mode 100644
--- a/toolkit/components/telemetry/tests/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/components/thumbnails/moz.build
+++ b/toolkit/components/thumbnails/moz.build
@@ -1,20 +1,20 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+BROWSER_CHROME_MANIFESTS += ['test/browser.ini']
 
 EXTRA_COMPONENTS += [
     'BrowserPageThumbs.manifest',
     'PageThumbsProtocol.js',
 ]
 
 EXTRA_JS_MODULES += [
     'BackgroundPageThumbs.jsm',
     'PageThumbs.jsm',
     'PageThumbsWorker.js',
 ]
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/components/thumbnails/test/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-BROWSER_CHROME_MANIFESTS += ['browser.ini']
-

deleted file mode 100644
--- a/toolkit/components/url-classifier/tests/mochitest/moz.build
+++ /dev/null
@@ -1,10 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

--- a/toolkit/components/url-classifier/tests/moz.build
+++ b/toolkit/components/url-classifier/tests/moz.build
@@ -1,11 +1,11 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_TOOL_DIRS += ['mochitest']
-
+MOCHITEST_MANIFESTS += ['mochitest/mochitest.ini']
+MOCHITEST_CHROME_MANIFESTS += ['mochitest/chrome.ini']
 XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

--- a/toolkit/components/urlformatter/moz.build
+++ b/toolkit/components/urlformatter/moz.build
@@ -1,15 +1,15 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+XPCSHELL_TESTS_MANIFESTS += ['tests/unit/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsIURLFormatter.idl',
 ]
 
 XPIDL_MODULE = 'urlformatter'
 
 EXTRA_COMPONENTS += [

deleted file mode 100644
--- a/toolkit/components/urlformatter/tests/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/components/viewsource/moz.build
+++ b/toolkit/components/viewsource/moz.build
@@ -1,9 +1,10 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+BROWSER_CHROME_MANIFESTS += ['test/browser/browser.ini']
+MOCHITEST_CHROME_MANIFESTS += ['test/chrome.ini']
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/components/viewsource/test/browser/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-BROWSER_CHROME_MANIFESTS += ['browser.ini']
-

deleted file mode 100644
--- a/toolkit/components/viewsource/test/moz.build
+++ /dev/null
@@ -1,10 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-TEST_DIRS += ['browser']
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

--- a/toolkit/components/workerloader/moz.build
+++ b/toolkit/components/workerloader/moz.build
@@ -1,8 +1,7 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
-
+MOCHITEST_CHROME_MANIFESTS += ['tests/chrome.ini']

deleted file mode 100644
--- a/toolkit/components/workerloader/tests/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

--- a/toolkit/components/workerlz4/moz.build
+++ b/toolkit/components/workerlz4/moz.build
@@ -1,21 +1,21 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+XPCSHELL_TESTS_MANIFESTS += ['tests/xpcshell/xpcshell.ini']
+
 JS_MODULES_PATH = 'modules/workers'
 
 EXTRA_JS_MODULES += [
     'lz4.js',
     'lz4_internal.js',
 ]
 
 SOURCES += [
     'lz4.cpp',
 ]
 
-TEST_DIRS += ['tests']
-
 EXPORT_LIBRARY = True
 FINAL_LIBRARY = 'xul'

deleted file mode 100644
--- a/toolkit/components/workerlz4/tests/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['xpcshell/xpcshell.ini']

--- a/toolkit/devtools/moz.build
+++ b/toolkit/devtools/moz.build
@@ -1,19 +1,20 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
-
 PARALLEL_DIRS += [
     'server',
     'client',
     'gcli',
     'sourcemap',
     'webconsole',
     'apps',
     'styleinspector',
     'acorn',
     'pretty-fast'
 ]
+
+MOCHITEST_CHROME_MANIFESTS += ['tests/mochitest/chrome.ini']
+XPCSHELL_TESTS_MANIFESTS += ['tests/unit/xpcshell.ini']

--- a/toolkit/devtools/server/moz.build
+++ b/toolkit/devtools/server/moz.build
@@ -1,15 +1,16 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+MOCHITEST_CHROME_MANIFESTS += ['tests/mochitest/chrome.ini']
+XPCSHELL_TESTS_MANIFESTS += ['tests/unit/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsIJSInspector.idl',
 ]
 
 XPIDL_MODULE = 'jsinspector'
 
 SOURCES += [

deleted file mode 100644
--- a/toolkit/devtools/server/tests/mochitest/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

deleted file mode 100644
--- a/toolkit/devtools/server/tests/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-DIRS += ['mochitest']
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/devtools/sourcemap/moz.build
+++ b/toolkit/devtools/sourcemap/moz.build
@@ -1,7 +1,7 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+XPCSHELL_TESTS_MANIFESTS += ['tests/unit/xpcshell.ini']

deleted file mode 100644
--- a/toolkit/devtools/sourcemap/tests/moz.build
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

deleted file mode 100644
--- a/toolkit/devtools/tests/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['mochitest/chrome.ini']
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/devtools/webconsole/moz.build
+++ b/toolkit/devtools/webconsole/moz.build
@@ -1,8 +1,9 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 if CONFIG['OS_TARGET'] != 'Android':
-    TEST_DIRS += ['test']
+    MOCHITEST_CHROME_MANIFESTS += ['test/chrome.ini']
+    XPCSHELL_TESTS_MANIFESTS += ['test/unit/xpcshell.ini']

deleted file mode 100644
--- a/toolkit/devtools/webconsole/test/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/forgetaboutsite/moz.build
+++ b/toolkit/forgetaboutsite/moz.build
@@ -1,12 +1,13 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+BROWSER_CHROME_MANIFESTS += ['test/browser/browser.ini']
+XPCSHELL_TESTS_MANIFESTS += ['test/unit/xpcshell.ini']
 
 EXTRA_JS_MODULES += [
     'ForgetAboutSite.jsm',
 ]
 

deleted file mode 100644
--- a/toolkit/forgetaboutsite/test/browser/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-BROWSER_CHROME_MANIFESTS += ['browser.ini']
-

deleted file mode 100644
--- a/toolkit/forgetaboutsite/test/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-DIRS += ['browser']
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/identity/moz.build
+++ b/toolkit/identity/moz.build
@@ -1,15 +1,16 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+MOCHITEST_CHROME_MANIFESTS += ['tests/chrome/chrome.ini']
+XPCSHELL_TESTS_MANIFESTS += ['tests/unit/xpcshell.ini']
 
 XPIDL_SOURCES += [
     'nsIIdentityCryptoService.idl',
 ]
 
 XPIDL_MODULE = 'identity'
 
 SOURCES += [

deleted file mode 100644
--- a/toolkit/identity/tests/chrome/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

deleted file mode 100644
--- a/toolkit/identity/tests/mochitest/moz.build
+++ /dev/null
@@ -1,6 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-

deleted file mode 100644
--- a/toolkit/identity/tests/moz.build
+++ /dev/null
@@ -1,9 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-DIRS += ['chrome', 'mochitest']
-
-XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']

--- a/toolkit/modules/moz.build
+++ b/toolkit/modules/moz.build
@@ -1,15 +1,18 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['tests']
+XPCSHELL_TESTS_MANIFESTS += ['tests/xpcshell/xpcshell.ini']
+BROWSER_CHROME_MANIFESTS += ['tests/browser/browser.ini']
+MOCHITEST_MANIFESTS += ['tests/mochitest/mochitest.ini']
+MOCHITEST_CHROME_MANIFESTS += ['tests/chrome/chrome.ini']
 
 EXTRA_JS_MODULES += [
     'AsyncShutdown.jsm',
     'CharsetMenu.jsm',
     'debug.js',
     'DeferredTask.jsm',
     'Deprecated.jsm',
     'Dict.jsm',

deleted file mode 100644
--- a/toolkit/modules/tests/browser/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-BROWSER_CHROME_MANIFESTS += ['browser.ini']
-

deleted file mode 100644
--- a/toolkit/modules/tests/chrome/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

deleted file mode 100644
--- a/toolkit/modules/tests/moz.build
+++ /dev/null
@@ -1,11 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-DIRS += ['browser']
-
-XPCSHELL_TESTS_MANIFESTS += ['xpcshell/xpcshell.ini']
-
-MOCHITEST_MANIFESTS += ['mochitest/mochitest.ini']

deleted file mode 100644
--- a/toolkit/mozapps/extensions/test/mochitest/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-

--- a/toolkit/mozapps/extensions/test/moz.build
+++ b/toolkit/mozapps/extensions/test/moz.build
@@ -1,13 +1,16 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 if CONFIG['MOZ_BUILD_APP'] != 'mobile':
-    DIRS += ['xpinstall', 'browser', 'mochitest']
+    DIRS += ['browser']
+
+    BROWSER_CHROME_MANIFESTS += ['xpinstall/browser.ini']
+    MOCHITEST_MANIFESTS += ['mochitest/mochitest.ini']
 
 XPCSHELL_TESTS_MANIFESTS += [
     'xpcshell/xpcshell-unpack.ini',
     'xpcshell/xpcshell.ini',
 ]

deleted file mode 100644
--- a/toolkit/mozapps/extensions/test/xpinstall/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-BROWSER_CHROME_MANIFESTS += ['browser.ini']
-

--- a/toolkit/profile/moz.build
+++ b/toolkit/profile/moz.build
@@ -1,15 +1,15 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+MOCHITEST_CHROME_MANIFESTS += ['test/chrome.ini']
 
 XPIDL_SOURCES += [
     'nsIProfileMigrator.idl',
     'nsIToolkitProfile.idl',
     'nsIToolkitProfileService.idl',
 ]
 
 XPIDL_MODULE = 'toolkitprofile'
@@ -24,9 +24,9 @@ LOCAL_INCLUDES += [
     '../xre',
     '/profile/dirserviceprovider/src',
 ]
 
 FAIL_ON_WARNINGS = True
 
 FINAL_LIBRARY = 'xulapp_s'
 
-JAR_MANIFESTS += ['jar.mn']
\ No newline at end of file
+JAR_MANIFESTS += ['jar.mn']

deleted file mode 100644
--- a/toolkit/profile/test/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

deleted file mode 100644
--- a/toolkit/themes/osx/mochitests/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-

--- a/toolkit/themes/osx/moz.build
+++ b/toolkit/themes/osx/moz.build
@@ -4,9 +4,9 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 DIRS += ['global', 'mozapps']
 
 if CONFIG['MOZ_HELP_VIEWER']:
     DIRS += ['help']
 
-TEST_DIRS += ['mochitests']
+MOCHITEST_CHROME_MANIFESTS += ['mochitests/chrome.ini']

--- a/toolkit/xre/moz.build
+++ b/toolkit/xre/moz.build
@@ -1,15 +1,18 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-TEST_DIRS += ['test']
+if CONFIG['OS_ARCH'] == 'WINNT':
+    TEST_DIRS += ['test/win']
+
+MOCHITEST_MANIFESTS += ['test/mochitest.ini']
 
 XPIDL_SOURCES += [
     'nsINativeAppSupport.idl',
 ]
 
 if CONFIG['OS_ARCH'] == 'WINNT':
     XPIDL_SOURCES += [
         'nsIWinAppHelper.idl',

deleted file mode 100644
--- a/toolkit/xre/test/moz.build
+++ /dev/null
@@ -1,11 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-if CONFIG['OS_ARCH'] == 'WINNT':
-    DIRS += ['win']
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-

deleted file mode 100644
--- a/uriloader/exthandler/tests/mochitest/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_MANIFESTS += ['mochitest.ini']
-

--- a/uriloader/exthandler/tests/moz.build
+++ b/uriloader/exthandler/tests/moz.build
@@ -1,18 +1,17 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-DIRS += ['mochitest']
-
 FAIL_ON_WARNINGS = True
 
+MOCHITEST_MANIFESTS += ['mochitest/mochitest.ini']
 XPCSHELL_TESTS_MANIFESTS += ['unit/xpcshell.ini']
 
 #FIXME/bug 575918: out-of-process xpcshell is broken on OS X
 if CONFIG['OS_ARCH'] != 'Darwin':
     # The encoding test is already implemented in the Downloads API by a set of
     # test cases with the string "content_encoding" in their names.
     if not CONFIG['MOZ_JSDOWNLOADS']:
         XPCSHELL_TESTS_MANIFESTS += ['unit_ipc/xpcshell.ini']

--- a/xpfe/appshell/src/moz.build
+++ b/xpfe/appshell/src/moz.build
@@ -1,15 +1,15 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-PARALLEL_DIRS += ['test']
+MOCHITEST_CHROME_MANIFESTS += ['test/chrome.ini']
 
 UNIFIED_SOURCES += [
     'nsAppShellFactory.cpp',
     'nsAppShellService.cpp',
     'nsAppShellWindowEnumerator.cpp',
     'nsChromeTreeOwner.cpp',
     'nsContentTreeOwner.cpp',
     'nsWebShellWindow.cpp',

deleted file mode 100644
--- a/xpfe/appshell/src/test/moz.build
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
-