diff --git a/lib/modules/manager/maven/update.spec.ts b/lib/modules/manager/maven/update.spec.ts
index 0e949fe284ef3f26df4b67977017b4c194e691c3..cf23ec6d63651bb97f81adcb257c9376a05c2875 100644
--- a/lib/modules/manager/maven/update.spec.ts
+++ b/lib/modules/manager/maven/update.spec.ts
@@ -49,7 +49,7 @@ describe('modules/manager/maven/update', () => {
     it('does not bump version if pom.xml has no version', () => {
       const { bumpedContent } = pomUpdater.bumpPackageVersion(
         minimumContent,
-        undefined,
+        '',
         'patch'
       );
 
diff --git a/lib/modules/manager/nuget/update.spec.ts b/lib/modules/manager/nuget/update.spec.ts
index 42bc169f7b2f8dee28ff2adfeed16bb6d6787236..a6abf1c90ade694c0d91474dc75bde33f9937f81 100644
--- a/lib/modules/manager/nuget/update.spec.ts
+++ b/lib/modules/manager/nuget/update.spec.ts
@@ -67,11 +67,7 @@ describe('modules/manager/nuget/update', () => {
     });
 
     it('does not bump version if extract found no version', () => {
-      const { bumpedContent } = bumpPackageVersion(
-        minimumContent,
-        undefined,
-        'patch'
-      );
+      const { bumpedContent } = bumpPackageVersion(minimumContent, '', 'patch');
 
       expect(bumpedContent).toEqual(minimumContent);
     });