diff --git a/lib/manager/npm/update/locked-dependency/parent-version.ts b/lib/manager/npm/update/locked-dependency/parent-version.ts
index dd058607b73d7aac4f9e5d0388d638157d6b6637..af3d4f395c6e8692f123aff65d73c68c1ac27c26 100644
--- a/lib/manager/npm/update/locked-dependency/parent-version.ts
+++ b/lib/manager/npm/update/locked-dependency/parent-version.ts
@@ -64,6 +64,7 @@ export async function findFirstParentVersion(
         return parentVersion;
       }
       if (semver.isVersion(constraint)) {
+        // istanbul ignore if: TODO FIX ME
         if (semver.isGreaterThan(constraint, targetVersion)) {
           // it's not the version we were after - the parent skipped to a higher version
           logger.debug(