diff --git a/googlemock/include/gmock/gmock-matchers.h b/googlemock/include/gmock/gmock-matchers.h
index 969d9202..59ef2f3d 100644
--- a/googlemock/include/gmock/gmock-matchers.h
+++ b/googlemock/include/gmock/gmock-matchers.h
@@ -4774,15 +4774,15 @@ class ExceptionMatcherImpl {
   ExceptionMatcherImpl(Matcher<const Err&> matcher)
       : matcher_(std::move(matcher)) {}
 
-  void DescribeTo(::std::ostream* os) const {
-    *os << "throws an exception of type " << GetTypeName<Err>();
+  void DescribeTo(std::ostream* os) const {
+    *os << "throws an exception which is a " << GetTypeName<Err>();
     if (matcher_.GetDescriber() != nullptr) {
       *os << " which ";
       matcher_.DescribeTo(os);
     }
   }
 
-  void DescribeNegationTo(::std::ostream* os) const {
+  void DescribeNegationTo(std::ostream* os) const {
     *os << "not (";
     DescribeTo(os);
     *os << ")";
@@ -4793,7 +4793,7 @@ class ExceptionMatcherImpl {
     try {
       (void)(std::forward<T>(x)());
     } catch (const Err& err) {
-      *listener << "throws an exception of type " << GetTypeName<Err>();
+      *listener << "throws an exception which is a " << GetTypeName<Err>();
       if (matcher_.GetDescriber() != nullptr) {
         *listener << " ";
         return matcher_.MatchAndExplain(err, listener);
@@ -4826,7 +4826,6 @@ class ExceptionMatcherImpl {
 // Throws()
 // Throws(exceptionMatcher)
 // ThrowsMessage(messageMatcher)
-// ThrowsMessageHasSubstr(message)
 //
 // This matcher accepts a callable and verifies that when invoked, it throws
 // an exception with the given type and properties.
@@ -4843,10 +4842,6 @@ class ExceptionMatcherImpl {
 //
 //   EXPECT_THAT(
 //       []() { throw std::runtime_error("message"); },
-//       ThrowsMessageHasSubstr<std::runtime_error>("message"));
-//
-//   EXPECT_THAT(
-//       []() { throw std::runtime_error("message"); },
 //       Throws<std::runtime_error>(
 //           Property(&std::runtime_error::what, HasSubstr("message"))));
 
@@ -4882,16 +4877,6 @@ ThrowsMessage(const MessageMatcher& messageMatcher) {
           Property("what", &std::exception::what,
                    MatcherCast<std::string>(messageMatcher))});
 }
-template <typename Err, typename Message = std::string>
-PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>>
-ThrowsMessageHasSubstr(const internal::StringLike<Message>& message) {
-  static_assert(
-      std::is_base_of<std::exception, Err>::value,
-      "expected an std::exception-derived class");
-  return MakePolymorphicMatcher(
-      internal::ExceptionMatcherImpl<Err>{
-          Property("what", &std::exception::what, HasSubstr(message))});
-}
 
 #endif  // GTEST_HAS_EXCEPTIONS
 
diff --git a/googlemock/test/gmock-matchers_test.cc b/googlemock/test/gmock-matchers_test.cc
index a8b39b8f..af3b02c1 100644
--- a/googlemock/test/gmock-matchers_test.cc
+++ b/googlemock/test/gmock-matchers_test.cc
@@ -8129,10 +8129,6 @@ TEST(ThrowsTest, Examples) {
       []() { throw std::runtime_error("message"); },
       ThrowsMessage<std::runtime_error>(HasSubstr("message")));
 
-  EXPECT_THAT(
-      []() { throw std::runtime_error("message"); },
-      ThrowsMessageHasSubstr<std::runtime_error>("message"));
-
   EXPECT_THAT(
       []() { throw std::runtime_error("message"); },
       Throws<std::runtime_error>(
@@ -8163,16 +8159,11 @@ TEST(ThrowsTest, CallableExecutedExactlyOnce) {
       ThrowsMessage<std::runtime_error>(HasSubstr("message")));
   EXPECT_EQ(a, 3u);
 
-  EXPECT_THAT(
-      [&a]() { a++; throw std::runtime_error("message"); },
-      ThrowsMessageHasSubstr<std::runtime_error>("message"));
-  EXPECT_EQ(a, 4u);
-
   EXPECT_THAT(
       [&a]() { a++; throw std::runtime_error("message"); },
       Throws<std::runtime_error>(
           Property(&std::runtime_error::what, HasSubstr("message"))));
-  EXPECT_EQ(a, 5u);
+  EXPECT_EQ(a, 4u);
 }
 
 TEST(ThrowsTest, Describe) {
@@ -8180,7 +8171,7 @@ TEST(ThrowsTest, Describe) {
   std::stringstream ss;
   matcher.DescribeTo(&ss);
   auto explanation = ss.str();
-  EXPECT_THAT(explanation, testing::HasSubstr("std::runtime_error"));
+  EXPECT_THAT(explanation, HasSubstr("std::runtime_error"));
 }
 
 TEST(ThrowsTest, Success) {
@@ -8189,7 +8180,7 @@ TEST(ThrowsTest, Success) {
   EXPECT_TRUE(
       matcher.MatchAndExplain(
           []() { throw std::runtime_error("error message"); }, &listener));
-  EXPECT_THAT(listener.str(), testing::HasSubstr("std::runtime_error"));
+  EXPECT_THAT(listener.str(), HasSubstr("std::runtime_error"));
 }
 
 TEST(ThrowsTest, FailWrongType) {
@@ -8198,8 +8189,8 @@ TEST(ThrowsTest, FailWrongType) {
   EXPECT_FALSE(
       matcher.MatchAndExplain(
           []() { throw std::logic_error("error message"); }, &listener));
-  EXPECT_THAT(listener.str(), testing::HasSubstr("std::logic_error"));
-  EXPECT_THAT(listener.str(), testing::HasSubstr("\"error message\""));
+  EXPECT_THAT(listener.str(), HasSubstr("std::logic_error"));
+  EXPECT_THAT(listener.str(), HasSubstr("\"error message\""));
 }
 
 TEST(ThrowsTest, FailWrongTypeNonStd) {
@@ -8210,7 +8201,7 @@ TEST(ThrowsTest, FailWrongTypeNonStd) {
           []() { throw 10; }, &listener));
   EXPECT_THAT(
       listener.str(),
-      testing::HasSubstr("throws an exception of an unknown type"));
+      HasSubstr("throws an exception of an unknown type"));
 }
 
 TEST(ThrowsTest, FailNoThrow) {
@@ -8221,7 +8212,7 @@ TEST(ThrowsTest, FailNoThrow) {
           []() { (void)0; }, &listener));
   EXPECT_THAT(
       listener.str(),
-      testing::HasSubstr("does not throw any exception"));
+      HasSubstr("does not throw any exception"));
 }
 
 class ThrowsPredicateTest: public TestWithParam<Matcher<void (*)()>> {};
@@ -8231,8 +8222,8 @@ TEST_P(ThrowsPredicateTest, Describe) {
   std::stringstream ss;
   matcher.DescribeTo(&ss);
   auto explanation = ss.str();
-  EXPECT_THAT(explanation, testing::HasSubstr("std::runtime_error"));
-  EXPECT_THAT(explanation, testing::HasSubstr("error message"));
+  EXPECT_THAT(explanation, HasSubstr("std::runtime_error"));
+  EXPECT_THAT(explanation, HasSubstr("error message"));
 }
 
 TEST_P(ThrowsPredicateTest, Success) {
@@ -8241,7 +8232,7 @@ TEST_P(ThrowsPredicateTest, Success) {
   EXPECT_TRUE(
       matcher.MatchAndExplain(
           []() { throw std::runtime_error("error message"); }, &listener));
-  EXPECT_THAT(listener.str(), testing::HasSubstr("std::runtime_error"));
+  EXPECT_THAT(listener.str(), HasSubstr("std::runtime_error"));
 }
 
 TEST_P(ThrowsPredicateTest, FailWrongType) {
@@ -8250,8 +8241,8 @@ TEST_P(ThrowsPredicateTest, FailWrongType) {
   EXPECT_FALSE(
       matcher.MatchAndExplain(
           []() { throw std::logic_error("error message"); }, &listener));
-  EXPECT_THAT(listener.str(), testing::HasSubstr("std::logic_error"));
-  EXPECT_THAT(listener.str(), testing::HasSubstr("\"error message\""));
+  EXPECT_THAT(listener.str(), HasSubstr("std::logic_error"));
+  EXPECT_THAT(listener.str(), HasSubstr("\"error message\""));
 }
 
 TEST_P(ThrowsPredicateTest, FailWrongTypeNonStd) {
@@ -8262,7 +8253,7 @@ TEST_P(ThrowsPredicateTest, FailWrongTypeNonStd) {
           []() { throw 10; }, &listener));
   EXPECT_THAT(
       listener.str(),
-      testing::HasSubstr("throws an exception of an unknown type"));
+      HasSubstr("throws an exception of an unknown type"));
 }
 
 TEST_P(ThrowsPredicateTest, FailWrongMessage) {
@@ -8271,8 +8262,8 @@ TEST_P(ThrowsPredicateTest, FailWrongMessage) {
   EXPECT_FALSE(
       matcher.MatchAndExplain(
           []() { throw std::runtime_error("wrong message"); }, &listener));
-  EXPECT_THAT(listener.str(), testing::HasSubstr("std::runtime_error"));
-  EXPECT_THAT(listener.str(), testing::HasSubstr("wrong message"));
+  EXPECT_THAT(listener.str(), HasSubstr("std::runtime_error"));
+  EXPECT_THAT(listener.str(), HasSubstr("wrong message"));
 }
 
 TEST_P(ThrowsPredicateTest, FailNoThrow) {
@@ -8283,18 +8274,16 @@ TEST_P(ThrowsPredicateTest, FailNoThrow) {
           []() { (void)0; }, &listener));
   EXPECT_THAT(
       listener.str(),
-      testing::HasSubstr("does not throw any exception"));
+      HasSubstr("does not throw any exception"));
 }
 
 INSTANTIATE_TEST_SUITE_P(AllMessagePredicates, ThrowsPredicateTest,
-    ::testing::Values(
+    Values(
         static_cast<Matcher<void (*)()>>(
             Throws<std::runtime_error>(
                 Property(&std::exception::what, HasSubstr("error message")))),
         static_cast<Matcher<void (*)()>>(
-            ThrowsMessage<std::runtime_error>(HasSubstr("error message"))),
-        static_cast<Matcher<void (*)()>>(
-            ThrowsMessageHasSubstr<std::runtime_error>("error message"))));
+            ThrowsMessage<std::runtime_error>(HasSubstr("error message")))));
 
 // Tests that Throws<E1>(Matcher<E2>{}) compiles even when E2 != const E1&.
 TEST(ThrowsPredicateCompilesTest, ExceptionMatcherAcceptsBroadType) {
@@ -8331,26 +8320,6 @@ TEST(ThrowsPredicateCompilesTest, MessageMatcherAcceptsNonMatcher) {
           []() { throw std::runtime_error("wrong error message"); }));
 }
 
-// Tests that ThrowsMessageHasSubstr accepts types that're
-// explicitly-convertible to std::string.
-TEST(ThrowsPredicateCompilesTest, StringLikeMessage) {
-  struct SomeCustomString {
-    std::string inner;
-
-    // Note: explicit conversion.
-    explicit operator std::string() const { return inner; }
-  };
-
-  Matcher<void (*)()> matcher = ThrowsMessageHasSubstr<std::runtime_error>(
-      SomeCustomString{"error message"});
-  EXPECT_TRUE(
-      matcher.Matches(
-          []() { throw std::runtime_error("error message"); }));
-  EXPECT_FALSE(
-      matcher.Matches(
-          []() { throw std::runtime_error("wrong message"); }));
-}
-
 #endif  // GTEST_HAS_EXCEPTIONS
 
 }  // namespace