diff --git a/lib/modules/manager/npm/extract/__snapshots__/index.spec.ts.snap b/lib/modules/manager/npm/extract/__snapshots__/index.spec.ts.snap
index 9e4cc0fe554e13..b7232f8442cd34 100644
--- a/lib/modules/manager/npm/extract/__snapshots__/index.spec.ts.snap
+++ b/lib/modules/manager/npm/extract/__snapshots__/index.spec.ts.snap
@@ -460,6 +460,13 @@ exports[`modules/manager/npm/extract/index .extractPackageFile() extracts volta
       "depType": "volta",
       "prettyDepType": "volta",
     },
+    {
+      "currentValue": "1.0.0",
+      "depName": "invalid",
+      "depType": "volta",
+      "prettyDepType": "volta",
+      "skipReason": "unknown-volta",
+    },
   ],
   "extractedConstraints": {
     "node": "8.9.2",
diff --git a/lib/modules/manager/npm/extract/index.spec.ts b/lib/modules/manager/npm/extract/index.spec.ts
index 3ac7f0bde2e763..8d596855174d19 100644
--- a/lib/modules/manager/npm/extract/index.spec.ts
+++ b/lib/modules/manager/npm/extract/index.spec.ts
@@ -490,6 +490,7 @@ describe('modules/manager/npm/extract/index', () => {
           yarn: '1.12.3',
           npm: '5.9.0',
           pnpm: '6.11.2',
+          invalid: '1.0.0',
         },
       };
       const pJsonStr = JSON.stringify(pJson);
@@ -507,6 +508,13 @@ describe('modules/manager/npm/extract/index', () => {
             depName: 'pnpm',
             prettyDepType: 'volta',
           },
+          {
+            depType: 'volta',
+            currentValue: '1.0.0',
+            depName: 'invalid',
+            prettyDepType: 'volta',
+            skipReason: 'unknown-volta',
+          },
         ],
       });
     });