diff --git a/lib/datasource/helm/index.ts b/lib/datasource/helm/index.ts
index 9eb5bf40f842ff13ee412d3d64e246779d5aabeb..394206d985c244f3239bf04e18e360461d0eae47 100644
--- a/lib/datasource/helm/index.ts
+++ b/lib/datasource/helm/index.ts
@@ -89,6 +89,11 @@ export class HelmDatasource extends Datasource {
     lookupName,
     registryUrl: helmRepository,
   }: GetReleasesConfig): Promise<ReleaseResult | null> {
+    // istanbul ignore if
+    if (!helmRepository) {
+      return null;
+    }
+
     const repositoryData = await this.getRepositoryData(helmRepository);
     if (!repositoryData) {
       logger.debug(`Couldn't get index.yaml file from ${helmRepository}`);
diff --git a/tsconfig.strict.json b/tsconfig.strict.json
index fee429149b033bf34d9c6bc9c0408c1b5924f5a7..ee3604b66b4ae51971b96fde4ca2a705154f889f 100644
--- a/tsconfig.strict.json
+++ b/tsconfig.strict.json
@@ -107,8 +107,6 @@
     "lib/datasource/go/types.ts",
     "lib/datasource/golang-version/index.ts",
     "lib/datasource/gradle-version/index.ts",
-    "lib/datasource/helm/common.ts",
-    "lib/datasource/helm/index.ts",
     "lib/datasource/index.ts",
     "lib/datasource/jenkins-plugins/index.ts",
     "lib/datasource/npm/get.ts",