diff --git a/test/sharness/t0021-config.sh b/test/sharness/t0021-config.sh
index 9fba63def..e3755c1e6 100755
--- a/test/sharness/t0021-config.sh
+++ b/test/sharness/t0021-config.sh
@@ -98,7 +98,7 @@ test_config_cmd() {
 
   test_expect_success "'ipfs config replace' injects privkey back" '
        ipfs config replace show_config &&
-	   grep "\"PrivKey\":" "$IPFS_PATH/config" | grep -e ": \".*\"" >/dev/null
+	   grep "\"PrivKey\":" "$IPFS_PATH/config" | grep -e ": \".\+\"" >/dev/null
   '
 
   test_expect_success "'ipfs config replace' with privkey erors out" '