diff --git a/llvm/test/tools/llvm-cov/gcov/relative-only.test b/llvm/test/tools/llvm-cov/gcov/relative-only.test
index 157441e7673f..20be39683fbe 100644
--- a/llvm/test/tools/llvm-cov/gcov/relative-only.test
+++ b/llvm/test/tools/llvm-cov/gcov/relative-only.test
@@ -1,4 +1,5 @@
 # Test -r (--relative-only) and -s (--source-prefix).
+# UNSUPPORTED: system-windows
 RUN: rm -rf %t && mkdir %t && cd %t
 RUN: cp %S/Inputs/abs-path.gcno %S/Inputs/abs-path.gcda .