diff --git a/googlemock/include/gmock/gmock-spec-builders.h b/googlemock/include/gmock/gmock-spec-builders.h
index 445a3ed85..e861817f4 100644
--- a/googlemock/include/gmock/gmock-spec-builders.h
+++ b/googlemock/include/gmock/gmock-spec-builders.h
@@ -1292,10 +1292,10 @@ class MockSpec {
       : function_mocker_(function_mocker), matchers_(matchers) {}
 
   // Adds a new default action spec to the function mocker and returns
-  // the newly created spec.
-  internal::OnCallSpec<F>& InternalDefaultActionSetAt(const char* file,
-                                                      int line, const char* obj,
-                                                      const char* call) {
+  // the newly created spec. .WillByDefault() must be called on the returned
+  // object.
+  [[nodiscard]] internal::OnCallSpec<F>& InternalDefaultActionSetAt(
+      const char* file, int line, const char* obj, const char* call) {
     LogWithLocation(internal::kInfo, file, line,
                     std::string("ON_CALL(") + obj + ", " + call + ") invoked");
     return function_mocker_->AddNewOnCallSpec(file, line, matchers_);
diff --git a/googlemock/test/gmock-internal-utils_test.cc b/googlemock/test/gmock-internal-utils_test.cc
index 6c769a882..7cffd18a3 100644
--- a/googlemock/test/gmock-internal-utils_test.cc
+++ b/googlemock/test/gmock-internal-utils_test.cc
@@ -545,7 +545,7 @@ TEST(ExpectCallTest, DoesNotLogWhenVerbosityIsError) {
 
 void OnCallLogger() {
   DummyMock mock;
-  ON_CALL(mock, TestMethod());
+  (void)ON_CALL(mock, TestMethod());
 }
 
 // Verifies that ON_CALL logs if the --gmock_verbose flag is set to "info".
@@ -568,7 +568,7 @@ TEST(OnCallTest, DoesNotLogWhenVerbosityIsError) {
 
 void OnCallAnyArgumentLogger() {
   DummyMock mock;
-  ON_CALL(mock, TestMethodArg(_));
+  (void)ON_CALL(mock, TestMethodArg(_));
 }
 
 // Verifies that ON_CALL prints provided _ argument.
diff --git a/googlemock/test/gmock-spec-builders_test.cc b/googlemock/test/gmock-spec-builders_test.cc
index 90f00c22a..287b249dc 100644
--- a/googlemock/test/gmock-spec-builders_test.cc
+++ b/googlemock/test/gmock-spec-builders_test.cc
@@ -160,7 +160,7 @@ class MockCC : public CC {
 // Tests that a method with expanded name compiles.
 TEST(OnCallSyntaxTest, CompilesWithMethodNameExpandedFromMacro) {
   MockCC cc;
-  ON_CALL(cc, Method());
+  (void)ON_CALL(cc, Method());
 }
 
 // Tests that the method with expanded name not only compiles but runs
@@ -193,7 +193,7 @@ TEST(OnCallSyntaxTest, EvaluatesFirstArgumentOnce) {
   MockA a;
   MockA* pa = &a;
 
-  ON_CALL(*pa++, DoA(_));
+  (void)ON_CALL(*pa++, DoA(_));
   EXPECT_EQ(&a + 1, pa);
 }
 
@@ -201,7 +201,7 @@ TEST(OnCallSyntaxTest, EvaluatesSecondArgumentOnce) {
   MockA a;
   int n = 0;
 
-  ON_CALL(a, DoA(n++));
+  (void)ON_CALL(a, DoA(n++));
   EXPECT_EQ(1, n);
 }
 
@@ -232,7 +232,7 @@ TEST(OnCallSyntaxTest, WillByDefaultIsMandatory) {
 
   EXPECT_DEATH_IF_SUPPORTED(
       {
-        ON_CALL(a, DoA(5));
+        (void)ON_CALL(a, DoA(5));
         a.DoA(5);
       },
       "");