diff --git a/clang/unittests/AST/SourceLocationTest.cpp b/clang/unittests/AST/SourceLocationTest.cpp
--- a/clang/unittests/AST/SourceLocationTest.cpp
+++ b/clang/unittests/AST/SourceLocationTest.cpp
@@ -23,8 +23,8 @@
 #include "llvm/Testing/Support/Annotations.h"
 #include "gtest/gtest.h"
 
-namespace clang {
-namespace ast_matchers {
+using namespace clang;
+using namespace clang::ast_matchers;
 
 // FIXME: Pull the *Verifier tests into their own test file.
 
@@ -646,7 +646,7 @@
   EXPECT_TRUE(Verifier.match(
       "void f() noexcept(false);\n",
       functionDecl(),
-      Language::Lang_CXX11));
+      clang::ast_matchers::Language::Lang_CXX11));
 }
 
 class FunctionDeclParametersRangeVerifier : public RangeVerifier<FunctionDecl> {
@@ -773,7 +773,7 @@
       "void f() noexcept(false);\n"
       "};\n",
       functionDecl(),
-      Language::Lang_CXX11));
+      clang::ast_matchers::Language::Lang_CXX11));
 }
 
 class ExceptionSpecRangeVerifier : public RangeVerifier<TypeLoc> {
@@ -816,19 +816,20 @@
   std::vector<std::string> Args;
   Args.push_back("-fms-extensions");
   EXPECT_TRUE(Verifier.match("void f() throw(...);\n", loc(functionType()),
-                             Args, Language::Lang_CXX));
+                             Args, clang::ast_matchers::Language::Lang_CXX));
 
   Verifier.expectRange(1, 10, 1, 10);
   EXPECT_TRUE(Verifier.match("void f() noexcept;\n", loc(functionType()),
-                             Language::Lang_CXX11));
+                             clang::ast_matchers::Language::Lang_CXX11));
 
   Verifier.expectRange(1, 10, 1, 24);
   EXPECT_TRUE(Verifier.match("void f() noexcept(false);\n", loc(functionType()),
-                             Language::Lang_CXX11));
+                             clang::ast_matchers::Language::Lang_CXX11));
 
   Verifier.expectRange(1, 10, 1, 32);
   EXPECT_TRUE(Verifier.match("void f() noexcept(noexcept(1+1));\n",
-                             loc(functionType()), Language::Lang_CXX11));
+                             loc(functionType()),
+                             clang::ast_matchers::Language::Lang_CXX11));
 
   ParmVarExceptionSpecRangeVerifier Verifier2;
   Verifier2.expectRange(1, 25, 1, 31);
@@ -840,7 +841,7 @@
   EXPECT_TRUE(Verifier2.match("void g(void (*fp)(void) noexcept(true));\n",
                               parmVarDecl(hasType(pointerType(pointee(
                                   parenType(innerType(functionType())))))),
-                              Language::Lang_CXX11));
+                              clang::ast_matchers::Language::Lang_CXX11));
 }
 
 TEST(Decl, MemberPointerStarLoc) {
@@ -859,6 +860,3 @@
   auto TL = D->getTypeSourceInfo()->getTypeLoc().castAs<MemberPointerTypeLoc>();
   ASSERT_EQ(SM.getFileOffset(TL.getStarLoc()), Example.point("star"));
 }
-
-} // end namespace ast_matchers
-} // end namespace clang