diff --git a/t/t0001-init.sh b/t/t0001-init.sh
index 26f8206326..1edd5aeb8f 100755
--- a/t/t0001-init.sh
+++ b/t/t0001-init.sh
@@ -392,13 +392,6 @@ test_expect_success SYMLINKS 're-init to move gitdir symlink' '
 	test_path_is_dir realgitdir/refs
 '
 
-# Tests for the hidden file attribute on windows
-is_hidden () {
-	# Use the output of `attrib`, ignore the absolute path
-	case "$(attrib "$1")" in *H*?:*) return 0;; esac
-	return 1
-}
-
 test_expect_success MINGW '.git hidden' '
 	rm -rf newdir &&
 	(
@@ -406,7 +399,7 @@ test_expect_success MINGW '.git hidden' '
 		mkdir newdir &&
 		cd newdir &&
 		git init &&
-		is_hidden .git
+		test_path_is_hidden .git
 	) &&
 	check_config newdir/.git false unset
 '
diff --git a/t/t5611-clone-config.sh b/t/t5611-clone-config.sh
index 60c1ba951b..8e0fd39823 100755
--- a/t/t5611-clone-config.sh
+++ b/t/t5611-clone-config.sh
@@ -92,24 +92,17 @@ test_expect_success 'clone -c remote.<remote>.fetch=<refspec> --origin=<name>' '
 	test_cmp expect actual
 '
 
-# Tests for the hidden file attribute on windows
-is_hidden () {
-	# Use the output of `attrib`, ignore the absolute path
-	case "$(attrib "$1")" in *H*?:*) return 0;; esac
-	return 1
-}
-
 test_expect_success MINGW 'clone -c core.hideDotFiles' '
 	test_commit attributes .gitattributes "" &&
 	rm -rf child &&
 	git clone -c core.hideDotFiles=false . child &&
-	! is_hidden child/.gitattributes &&
+	! test_path_is_hidden child/.gitattributes &&
 	rm -rf child &&
 	git clone -c core.hideDotFiles=dotGitOnly . child &&
-	! is_hidden child/.gitattributes &&
+	! test_path_is_hidden child/.gitattributes &&
 	rm -rf child &&
 	git clone -c core.hideDotFiles=true . child &&
-	is_hidden child/.gitattributes
+	test_path_is_hidden child/.gitattributes
 '
 
 test_done
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 88b7dbd69a..d9ef356a16 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -1551,3 +1551,13 @@ test_bitmap_traversal () {
 	test_cmp "$1.normalized" "$2.normalized" &&
 	rm -f "$1.normalized" "$2.normalized"
 }
+
+# Tests for the hidden file attribute on Windows
+test_path_is_hidden () {
+	test_have_prereq MINGW ||
+	BUG "test_path_is_hidden can only be used on Windows"
+
+	# Use the output of `attrib`, ignore the absolute path
+	case "$("$SYSTEMROOT"/system32/attrib "$1")" in *H*?:*) return 0;; esac
+	return 1
+}