new file mode 100644
--- /dev/null
+++ b/testing/docker/tester/buildprops.json
@@ -0,0 +1,8 @@
+{
+  "properties": {
+    "buildername": ""
+  },
+  "sourcestamp": {
+    "changes": []
+  }
+}

--- a/testing/taskcluster/tasks/tests/b2g_emulator_cpp_unit.yml
+++ b/testing/taskcluster/tasks/tests/b2g_emulator_cpp_unit.yml
@@ -6,17 +6,16 @@ task:
     name: '[TC] CPP Unit Tests'
     description: CPP Unit Tests test run
 
   payload:
     command:
       - entrypoint
       - >
         python ./mozharness/scripts/b2g_emulator_unittest.py
-        --no-read-buildbot-config
         --config-file ./mozharness/configs/b2g/emulator_automation_config.py
         --config-file ./mozharness_configs/emulator_override.py
         --download-symbols ondemand
         --test-suite cppunittest
         --installer-url {{build_url}}
         --test-url {{tests_url}}
         --xre-url https://s3-us-west-2.amazonaws.com/test-caching/packages/xre_linux_x86.zip
     artifacts:

--- a/testing/taskcluster/tasks/tests/b2g_emulator_crashtest.yml
+++ b/testing/taskcluster/tasks/tests/b2g_emulator_crashtest.yml
@@ -7,17 +7,16 @@ task:
     description: Crashtest test run {{chunk}}
 
   payload:
     maxRunTime: 3600
     command:
       - entrypoint
       - >
         python ./mozharness/scripts/b2g_emulator_unittest.py
-        --no-read-buildbot-config
         --config-file ./mozharness/configs/b2g/emulator_automation_config.py
         --config-file ./mozharness_configs/emulator_override.py
         --download-symbols ondemand
         --test-suite crashtest
         --installer-url {{build_url}}
         --test-url {{tests_url}}
         --xre-url https://s3-us-west-2.amazonaws.com/test-caching/packages/xre_linux_x86.zip
         --this-chunk {{chunk}}

--- a/testing/taskcluster/tasks/tests/b2g_emulator_js_reftest.yml
+++ b/testing/taskcluster/tasks/tests/b2g_emulator_js_reftest.yml
@@ -6,17 +6,16 @@ task:
     name: '[TC] JSReftest'
     description: JSReftest test run {{chunk}}
 
   payload:
     command:
       - entrypoint
       - >
         python ./mozharness/scripts/b2g_emulator_unittest.py
-        --no-read-buildbot-config
         --config-file ./mozharness/configs/b2g/emulator_automation_config.py
         --config-file ./mozharness_configs/emulator_override.py
         --download-symbols ondemand
         --test-suite jsreftest
         --installer-url {{build_url}}
         --test-url {{tests_url}}
         --xre-url https://s3-us-west-2.amazonaws.com/test-caching/packages/xre_linux_x86.zip
         --this-chunk {{chunk}}

--- a/testing/taskcluster/tasks/tests/b2g_emulator_mochitest.yml
+++ b/testing/taskcluster/tasks/tests/b2g_emulator_mochitest.yml
@@ -7,17 +7,16 @@ task:
     description: Mochitest test run {{chunk}}
 
   payload:
     maxRunTime: 7200
     command:
       - entrypoint
       - >
         python ./mozharness/scripts/b2g_emulator_unittest.py
-        --no-read-buildbot-config
         --config-file ./mozharness/configs/b2g/emulator_automation_config.py
         --config-file ./mozharness_configs/gaia_integration_override.py
         --config-file ./mozharness_configs/emulator_override.py
         --download-symbols ondemand
         --test-suite mochitest
         --installer-url {{build_url}}
         --test-url {{tests_url}}
         --xre-url https://s3-us-west-2.amazonaws.com/test-caching/packages/xre_linux_x86.zip

--- a/testing/taskcluster/tasks/tests/b2g_emulator_mochitest_media.yml
+++ b/testing/taskcluster/tasks/tests/b2g_emulator_mochitest_media.yml
@@ -6,17 +6,16 @@ task:
     name: '[TC] Mochitest'
     description: Mochitest Media test run
 
   payload:
     command:
       - entrypoint
       - >
         python ./mozharness/scripts/b2g_emulator_unittest.py
-        --no-read-buildbot-config
         --config-file ./mozharness/configs/b2g/emulator_automation_config.py
         --config-file ./mozharness_configs/gaia_integration_override.py
         --config-file ./mozharness_configs/emulator_override.py
         --download-symbols ondemand
         --test-suite mochitest
         --test-path dom/media/tests/
         --installer-url {{build_url}}
         --test-url {{tests_url}}

--- a/testing/taskcluster/tasks/tests/b2g_emulator_reftest.yml
+++ b/testing/taskcluster/tasks/tests/b2g_emulator_reftest.yml
@@ -6,17 +6,16 @@ task:
     name: '[TC] Reftest'
     description: Reftest test run {{chunk}}
 
   payload:
     command:
       - entrypoint
       - >
         python ./mozharness/scripts/b2g_emulator_unittest.py
-        --no-read-buildbot-config
         --config-file ./mozharness/configs/b2g/emulator_automation_config.py
         --config-file ./mozharness_configs/emulator_override.py
         --download-symbols ondemand
         --test-suite reftest
         --installer-url {{build_url}}
         --test-url {{tests_url}}
         --xre-url https://s3-us-west-2.amazonaws.com/test-caching/packages/xre_linux_x86.zip
         --this-chunk {{chunk}}

--- a/testing/taskcluster/tasks/tests/b2g_emulator_xpcshell.yml
+++ b/testing/taskcluster/tasks/tests/b2g_emulator_xpcshell.yml
@@ -6,17 +6,16 @@ task:
     name: '[TC] XPCShell'
     description: XPCShell test run
 
   payload:
     command:
       - entrypoint
       - >
         python ./mozharness/scripts/b2g_emulator_unittest.py
-        --no-read-buildbot-config
         --config-file ./mozharness/configs/b2g/emulator_automation_config.py
         --config-file ./mozharness_configs/emulator_override.py
         --download-symbols ondemand
         --test-suite xpcshell
         --installer-url {{build_url}}
         --test-url {{tests_url}}
         --xre-url https://s3-us-west-2.amazonaws.com/test-caching/packages/xre_linux_x86.zip
     artifacts:

--- a/testing/taskcluster/tasks/tests/b2g_emulator_xpcshell_chunked.yml
+++ b/testing/taskcluster/tasks/tests/b2g_emulator_xpcshell_chunked.yml
@@ -6,17 +6,16 @@ task:
     name: '[TC] XPCShell'
     description: XPCShell test run {{chunk}}
 
   payload:
     command:
       - entrypoint
       - >
         python ./mozharness/scripts/b2g_emulator_unittest.py
-        --no-read-buildbot-config
         --config-file ./mozharness/configs/b2g/emulator_automation_config.py
         --config-file ./mozharness_configs/emulator_override.py
         --download-symbols ondemand
         --test-suite xpcshell
         --installer-url {{build_url}}
         --test-url {{tests_url}}
         --xre-url https://s3-us-west-2.amazonaws.com/test-caching/packages/xre_linux_x86.zip
         --this-chunk {{chunk}}