--- a/mailnews/base/test/unit/xpcshell.ini
+++ b/mailnews/base/test/unit/xpcshell.ini
@@ -22,16 +22,17 @@ support-files = nodelist_test.xml data/*
 [test_compactColumnSave.js]
 [test_copyChaining.js]
 [test_copyThenMoveManual.js]
 [test_copyToInvalidDB.js]
 [test_detachToFile.js]
 [test_emptyTrash.js]
 [test_fix_deferred_accounts.js]
 [test_folderCompact.js]
+skip-if = os == "win" # see bug 1403771
 [test_folderLookupService.js]
 [test_getMsgTextFromStream.js]
 [test_hostnameUtils.js]
 [test_imapPump.js]
 [test_inheritedFolderProperties.js]
 [test_iteratorUtils.js]
 [test_jsTreeSelection.js]
 [test_junkingWhenDisabled.js]

--- a/mailnews/local/test/unit/xpcshell.ini
+++ b/mailnews/local/test/unit/xpcshell.ini
@@ -16,16 +16,17 @@ skip-if = os == "win"
 [test_msgIDParsing.js]
 [test_nsIMsgLocalMailFolder.js]
 [test_nsIMsgParseMailMsgState.js]
 [test_nsIMsgPluggableStore.js]
 [test_over2GBMailboxes.js]
 [test_over4GBMailboxes.js]
 # This one needs a longer timeout for working with a 4GiB file.
 requesttimeoutfactor = 2
+skip-if = os == "win" # see bug 1403771
 [test_pop3AuthMethods.js]
 [test_pop3Download.js]
 [test_pop3DownloadTempFileHandling.js]
 [test_pop3Duplicates.js]
 [test_pop3FilterActions.js]
 [test_pop3GSSAPIFail.js]
 [test_pop3GetNewMail.js]
 [test_pop3MoveFilter.js]