diff --git a/.github/workflows/linux-kernel.yml b/.github/workflows/linux-kernel.yml
index ab01768ae..35871ff08 100644
--- a/.github/workflows/linux-kernel.yml
+++ b/.github/workflows/linux-kernel.yml
@@ -10,4 +10,4 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Create linux kernel library + build + test
-      run: make -C contrib/linux-kernel test
+      run: make -C contrib/linux-kernel test CFLAGS="-Werror -Wunused-const-variable -Wunused-but-set-variable"
diff --git a/contrib/linux-kernel/Makefile b/contrib/linux-kernel/Makefile
index e9a7bb0da..1997f9b81 100644
--- a/contrib/linux-kernel/Makefile
+++ b/contrib/linux-kernel/Makefile
@@ -65,7 +65,7 @@ import: libzstd
 
 .PHONY: test
 test: libzstd
-	$(MAKE) -C test run-test CFLAGS="-O3" -j
+	$(MAKE) -C test run-test CFLAGS="-O3 $(CFLAGS)" -j
 
 .PHONY: clean
 clean: