diff --git a/ci/build_and_test.bat b/ci/build_and_test.bat
index 16608a4aaa7..b6b5ca21364 100755
--- a/ci/build_and_test.bat
+++ b/ci/build_and_test.bat
@@ -13,7 +13,13 @@ if "%CFG_RELEASE_CHANNEL%"=="nightly" (
 )
 cargo test || exit /b 1
 
-:: Build and test other crates
+:: Build and test config_proc_macro
 cd config_proc_macro || exit /b 1
 cargo build --locked || exit /b 1
 cargo test || exit /b 1
+
+:: Build and test check_diff
+cd ..
+cd check_diff || exit /b 1
+cargo build --locked || exit /b 1
+cargo test || exit /b 1
diff --git a/ci/build_and_test.sh b/ci/build_and_test.sh
index 207da362fd6..dd9a0c0fd9b 100755
--- a/ci/build_and_test.sh
+++ b/ci/build_and_test.sh
@@ -17,7 +17,13 @@ else
 fi
 cargo test
 
-# Build and test other crates
+# Build and test config_proc_macro
 cd config_proc_macro
 cargo build --locked
 cargo test
+
+# Build and test check_diff
+cd ..
+cd check_diff
+cargo build --locked
+cargo test