diff --git a/googlemock/src/gmock_main.cc b/googlemock/src/gmock_main.cc
index a3a271e..18c500f 100644
--- a/googlemock/src/gmock_main.cc
+++ b/googlemock/src/gmock_main.cc
@@ -32,6 +32,23 @@
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 
+#if GTEST_OS_ESP8266 || GTEST_OS_ESP32
+#if GTEST_OS_ESP8266
+extern "C" {
+#endif
+void setup() {
+  // Since Google Mock depends on Google Test, InitGoogleMock() is
+  // also responsible for initializing Google Test.  Therefore there's
+  // no need for calling testing::InitGoogleTest() separately.
+  testing::InitGoogleMock();
+}
+void loop() { RUN_ALL_TESTS(); }
+#if GTEST_OS_ESP8266
+}
+#endif
+
+#else
+
 // MS C++ compiler/linker has a bug on Windows (not on Windows CE), which
 // causes a link error when _tmain is defined in a static library and UNICODE
 // is enabled. For this reason instead of _tmain, main function is used on
@@ -52,3 +69,4 @@
   testing::InitGoogleMock(&argc, argv);
   return RUN_ALL_TESTS();
 }
+#endif