diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 93cfa98..87cfbea 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -15,7 +15,7 @@ jobs:
       - name: Build project
         uses: threeal/cmake-action@v1.3.0
         with:
-          options: BUILD_TESTING=ON
+          options: MUSEN_BUILD_TESTS=ON
           run-build: true
 
       - name: Test project
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5da426..76219dd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 3.5)
 
 project(musen)
 
+option(MUSEN_BUILD_TESTS "Build test targets.")
+
 function(cpmaddpackage)
   file(
     DOWNLOAD https://github.com/cpm-cmake/CPM.cmake/releases/download/v0.40.1/CPM.cmake
@@ -42,7 +44,7 @@ install(TARGETS ${PROJECT_NAME}
 
 add_subdirectory("examples")
 
-if(BUILD_TESTING)
+if(MUSEN_BUILD_TESTS)
   enable_testing()
   add_subdirectory("test/gtest")
 endif()
diff --git a/README.md b/README.md
index 0d71c0f..66089e6 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,7 @@ See [releases](https://github.com/ichiro-its/musen/releases) for the latest vers
   ```
 - (Optional) reconfigure CMake to run the unit tests.
   ```sh
-  $ cmake -DBUILD_TESTING=ON .. && make && ctest --verbose
+  $ cmake -DMUSEN_BUILD_TESTS=ON .. && make && ctest --verbose
   ```
 
 ## Usages