diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 7e633bb04eeb2195515ee17124f98903c406b024..93605b844ae8df87225b79e60ff816dcdafdbc2a 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -3257,6 +3257,7 @@ VersionTuple visualstudio::getMSVCVersion(const Driver *D,
     if (Major || Minor || Micro)
       return VersionTuple(Major, Minor, Micro);
 
+    // FIXME: Consider bumping this to 19 (MSVC2015) soon.
     return VersionTuple(18);
   }
   return VersionTuple();
diff --git a/lib/Frontend/TextDiagnostic.cpp b/lib/Frontend/TextDiagnostic.cpp
index 5dda151d5581d79ea00b119ff46e6070fe6c75a3..fdaf44d77b327fdadde9ba8c0024de6fcb911c5f 100644
--- a/lib/Frontend/TextDiagnostic.cpp
+++ b/lib/Frontend/TextDiagnostic.cpp
@@ -819,7 +819,15 @@ void TextDiagnostic::emitDiagnosticLoc(SourceLocation Loc, PresumedLoc PLoc,
   switch (DiagOpts->getFormat()) {
   case DiagnosticOptions::Clang:
   case DiagnosticOptions::Vi:    OS << ':';    break;
-  case DiagnosticOptions::MSVC:  OS << ") : "; break;
+  case DiagnosticOptions::MSVC:
+    // MSVC2013 and before print 'file(4) : error'. MSVC2015 gets rid of the
+    // space and prints 'file(4): error'.
+    OS << ')';
+    if (LangOpts.MSCompatibilityVersion &&
+        !LangOpts.isCompatibleWithMSVC(LangOptions::MSVC2015))
+      OS << ' ';
+    OS << ": ";
+    break;
   }
 
   if (DiagOpts->ShowSourceRanges && !Ranges.empty()) {
diff --git a/test/Misc/diag-format.c b/test/Misc/diag-format.c
index 8e30cf76afd2ab4b04a1aa21d554ebb4756a376f..e9d8448d2a9a2e22a7fc394b724f07dd6b8b42f1 100644
--- a/test/Misc/diag-format.c
+++ b/test/Misc/diag-format.c
@@ -4,13 +4,15 @@
 //
 // RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -fmsc-version=1300  %s 2>&1 | FileCheck %s -check-prefix=MSVC2010
 // RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -fms-compatibility-version=13.00  %s 2>&1 | FileCheck %s -check-prefix=MSVC2010
-// RUN: %clang -fsyntax-only -fdiagnostics-format=msvc  %s 2>&1 | FileCheck %s -check-prefix=MSVC
+// RUN: %clang -fsyntax-only -fdiagnostics-format=msvc  %s 2>&1 | FileCheck %s -check-prefix=MSVCNOTRIPLE
 // RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -fmsc-version=1300 -target x86_64-pc-win32 %s 2>&1 | FileCheck %s -check-prefix=MSVC2010
 // RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -fms-compatibility-version=13.00 -target x86_64-pc-win32 %s 2>&1 | FileCheck %s -check-prefix=MSVC2010
 // RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -target x86_64-pc-win32 %s 2>&1 | FileCheck %s -check-prefix=MSVC
 // RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -fmsc-version=1300 -target x86_64-pc-win32 -fshow-column %s 2>&1 | FileCheck %s -check-prefix=MSVC2010
 // RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -fms-compatibility-version=13.00 -target x86_64-pc-win32 -fshow-column %s 2>&1 | FileCheck %s -check-prefix=MSVC2010
-// RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -target x86_64-pc-win32 -fshow-column %s 2>&1 | FileCheck %s -check-prefix=MSVC
+// RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -fmsc-version=1800 -target x86_64-pc-win32 -fshow-column %s 2>&1 | FileCheck %s -check-prefix=MSVC2013
+// RN: %clang -fsyntax-only -fdiagnostics-format=msvc -target x86_64-pc-win32 -fshow-column %s 2>&1 | FileCheck %s -check-prefix=MSVC
+// RUN: %clang -fsyntax-only -fdiagnostics-format=msvc -fmsc-version=1900 -target x86_64-pc-win32 -fshow-column %s 2>&1 | FileCheck %s -check-prefix=MSVC2015
 //
 // RUN: %clang -fsyntax-only -fdiagnostics-format=vi    %s 2>&1 | FileCheck %s -check-prefix=VI
 //
@@ -20,11 +22,9 @@
 //
 // RUN: not %clang -fsyntax-only -Werror -fdiagnostics-format=msvc-fallback -fmsc-version=1300 %s 2>&1 | FileCheck %s -check-prefix=MSVC2010-FALLBACK
 // RUN: not %clang -fsyntax-only -Werror -fdiagnostics-format=msvc-fallback -fms-compatibility-version=13.00 %s 2>&1 | FileCheck %s -check-prefix=MSVC2010-FALLBACK
-// RUN: not %clang -fsyntax-only -Werror -fdiagnostics-format=msvc-fallback %s 2>&1 | FileCheck %s -check-prefix=MSVC-FALLBACK
-
-
-
-
+// RUN: not %clang -fsyntax-only -Werror -fdiagnostics-format=msvc-fallback %s -fmsc-version=1800 2>&1 | FileCheck %s -check-prefix=MSVC2013-FALLBACK
+// RN: not %clang -fsyntax-only -Werror -fdiagnostics-format=msvc-fallback %s 2>&1 | FileCheck %s -check-prefix=MSVC-FALLBACK
+// RUN: not %clang -fsyntax-only -Werror -fdiagnostics-format=msvc-fallback %s -fmsc-version=1900 2>&1 | FileCheck %s -check-prefix=MSVC2015-FALLBACK
 
 
 
@@ -36,10 +36,15 @@
 #endif bad // extension!
 // DEFAULT: {{.*}}:36:8: warning: extra tokens at end of #endif directive [-Wextra-tokens]
 // MSVC2010: {{.*}}(36,7) : warning: extra tokens at end of #endif directive [-Wextra-tokens]
+// MSVC2013: {{.*}}(36,8) : warning: extra tokens at end of #endif directive [-Wextra-tokens]
 // MSVC: {{.*}}(36,8) : warning: extra tokens at end of #endif directive [-Wextra-tokens]
+// MSVCNOTRIPLE: {{.*}}(36,8): warning: extra tokens at end of #endif directive [-Wextra-tokens]
+// MSVC2015: {{.*}}(36,8): warning: extra tokens at end of #endif directive [-Wextra-tokens]
 // VI: {{.*}} +36:8: warning: extra tokens at end of #endif directive [-Wextra-tokens]
-// MSVC_ORIG: {{.*}}(36) : warning: extra tokens at end of #endif directive [-Wextra-tokens]
+// MSVC_ORIG: {{.*}}(36): warning: extra tokens at end of #endif directive [-Wextra-tokens]
 // NO_COLUMN: {{.*}}:36: warning: extra tokens at end of #endif directive [-Wextra-tokens]
 // MSVC2010-FALLBACK: {{.*}}(36,7) : error(clang): extra tokens at end of #endif directive
+// MSVC2013-FALLBACK: {{.*}}(36,8) : error(clang): extra tokens at end of #endif directive
 // MSVC-FALLBACK: {{.*}}(36,8) : error(clang): extra tokens at end of #endif directive
+// MSVC2015-FALLBACK: {{.*}}(36,8): error(clang): extra tokens at end of #endif directive
 int x;