diff --git a/utils/unittest/googlemock/include/gmock/gmock-actions.h b/utils/unittest/googlemock/include/gmock/gmock-actions.h
index b3f654af348..8e17468a2cf 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-actions.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-actions.h
@@ -33,6 +33,8 @@
 //
 // This file implements some commonly used actions.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
 #define GMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/gmock-cardinalities.h b/utils/unittest/googlemock/include/gmock/gmock-cardinalities.h
index fc315f92ab5..b0da3bde8b9 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-cardinalities.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-cardinalities.h
@@ -35,6 +35,8 @@
 // cardinalities can be defined by the user implementing the
 // CardinalityInterface interface if necessary.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
 #define GMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/gmock-generated-actions.h b/utils/unittest/googlemock/include/gmock/gmock-generated-actions.h
index b5a889c0c3a..ee00ad839d8 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-generated-actions.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-generated-actions.h
@@ -35,6 +35,8 @@
 //
 // This file implements some commonly used variadic actions.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_ACTIONS_H_
 #define GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_ACTIONS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/gmock-generated-function-mockers.h b/utils/unittest/googlemock/include/gmock/gmock-generated-function-mockers.h
index 4fa5ca94849..feec9857827 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-generated-function-mockers.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-generated-function-mockers.h
@@ -37,6 +37,8 @@
 //
 // This file implements function mockers of various arities.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_FUNCTION_MOCKERS_H_
 #define GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_FUNCTION_MOCKERS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/gmock-generated-matchers.h b/utils/unittest/googlemock/include/gmock/gmock-generated-matchers.h
index 57056fd91d2..d210fd90929 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-generated-matchers.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-generated-matchers.h
@@ -35,6 +35,8 @@
 //
 // This file implements some commonly used variadic matchers.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_MATCHERS_H_
 #define GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_MATCHERS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/gmock-generated-nice-strict.h b/utils/unittest/googlemock/include/gmock/gmock-generated-nice-strict.h
index 4095f4d5bc7..9a5c15f60e4 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-generated-nice-strict.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-generated-nice-strict.h
@@ -68,6 +68,8 @@
 // cannot have arguments passed by non-const reference, which are
 // banned by the Google C++ style guide anyway.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_NICE_STRICT_H_
 #define GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_NICE_STRICT_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/gmock-matchers.h b/utils/unittest/googlemock/include/gmock/gmock-matchers.h
index 749a30e4e6d..ec8c237e254 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-matchers.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-matchers.h
@@ -35,6 +35,8 @@
 // matchers can be defined by the user implementing the
 // MatcherInterface<T> interface if necessary.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
 #define GMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/gmock-more-actions.h b/utils/unittest/googlemock/include/gmock/gmock-more-actions.h
index 3d387b6b7d7..a3e463d91a7 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-more-actions.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-more-actions.h
@@ -33,6 +33,8 @@
 //
 // This file implements some actions that depend on gmock-generated-actions.h.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
 #define GMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/gmock-more-matchers.h b/utils/unittest/googlemock/include/gmock/gmock-more-matchers.h
index 3db899f4297..6a060f3d767 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-more-matchers.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-more-matchers.h
@@ -36,6 +36,8 @@
 // Note that tests are implemented in gmock-matchers_test.cc rather than
 // gmock-more-matchers-test.cc.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_GMOCK_MORE_MATCHERS_H_
 #define GMOCK_GMOCK_MORE_MATCHERS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/gmock-spec-builders.h b/utils/unittest/googlemock/include/gmock/gmock-spec-builders.h
index fed7de66bc4..cafd9434c4f 100644
--- a/utils/unittest/googlemock/include/gmock/gmock-spec-builders.h
+++ b/utils/unittest/googlemock/include/gmock/gmock-spec-builders.h
@@ -57,6 +57,8 @@
 // where all clauses are optional, and .InSequence()/.After()/
 // .WillOnce() can appear any number of times.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
 #define GMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/internal/gmock-generated-internal-utils.h b/utils/unittest/googlemock/include/gmock/internal/gmock-generated-internal-utils.h
index 7811e43f87c..ff69b7f9899 100644
--- a/utils/unittest/googlemock/include/gmock/internal/gmock-generated-internal-utils.h
+++ b/utils/unittest/googlemock/include/gmock/internal/gmock-generated-internal-utils.h
@@ -38,6 +38,8 @@
 // This file contains template meta-programming utility classes needed
 // for implementing Google Mock.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_GENERATED_INTERNAL_UTILS_H_
 #define GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_GENERATED_INTERNAL_UTILS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/internal/gmock-internal-utils.h b/utils/unittest/googlemock/include/gmock/internal/gmock-internal-utils.h
index e2ddb05c91d..657261749aa 100644
--- a/utils/unittest/googlemock/include/gmock/internal/gmock-internal-utils.h
+++ b/utils/unittest/googlemock/include/gmock/internal/gmock-internal-utils.h
@@ -35,6 +35,8 @@
 // Mock.  They are subject to change without notice, so please DO NOT
 // USE THEM IN USER CODE.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
 #define GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
 
diff --git a/utils/unittest/googlemock/include/gmock/internal/gmock-port.h b/utils/unittest/googlemock/include/gmock/internal/gmock-port.h
index 63f4a6802e8..0a2935d414b 100644
--- a/utils/unittest/googlemock/include/gmock/internal/gmock-port.h
+++ b/utils/unittest/googlemock/include/gmock/internal/gmock-port.h
@@ -36,6 +36,8 @@
 // end with _ are part of Google Mock's public API and can be used by
 // code outside Google Mock.
 
+// IWYU pragma: private, include "gmock/gmock.h"
+
 #ifndef GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
 #define GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_