diff --git a/.gitignore b/.gitignore
index 16c56e68..73cdd2c2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,3 +41,14 @@ googletest/fused-src/
 
 # macOS files
 .DS_Store
+
+# Ignore cmake generated directories and files.
+CMakeFiles
+CTestTestfile.cmake
+Makefile
+cmake_install.cmake
+googlemock/CMakeFiles
+googlemock/CTestTestfile.cmake
+googlemock/Makefile
+googlemock/cmake_install.cmake
+googlemock/gtest