diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index 1fd03cae80..3e87de2a76 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -870,7 +870,7 @@ test_expect_success '--set-upstream-to fails on locked config' '
 	>.git/config.lock &&
 	git branch locked &&
 	test_must_fail git branch --set-upstream-to locked 2>err &&
-	test_i18ngrep "could not lock config file .git/config: File exists" err
+	test_i18ngrep "could not lock config file .git/config" err
 '
 
 test_expect_success 'use --set-upstream-to modify HEAD' '
@@ -901,7 +901,7 @@ test_expect_success '--unset-upstream should fail if config is locked' '
 	git branch --set-upstream-to locked &&
 	>.git/config.lock &&
 	test_must_fail git branch --unset-upstream 2>err &&
-	test_i18ngrep "could not lock config file .git/config: File exists" err
+	test_i18ngrep "could not lock config file .git/config" err
 '
 
 test_expect_success 'test --unset-upstream on HEAD' '