diff --git a/lib/manager/poetry/artifacts.spec.ts b/lib/manager/poetry/artifacts.spec.ts
index f4b05fb86efc27..52289eb2935b3e 100644
--- a/lib/manager/poetry/artifacts.spec.ts
+++ b/lib/manager/poetry/artifacts.spec.ts
@@ -209,7 +209,7 @@ describe('.updateArtifacts()', () => {
         newPackageFileContent: '{}',
         config: {
           ...config,
-          isLockFileMaintenance: true,
+          updateType: 'lockFileMaintenance',
         },
       })
     ).not.toBeNull();
diff --git a/lib/manager/poetry/artifacts.ts b/lib/manager/poetry/artifacts.ts
index 00b39d1b4407fa..9d4bba5551d040 100644
--- a/lib/manager/poetry/artifacts.ts
+++ b/lib/manager/poetry/artifacts.ts
@@ -91,7 +91,9 @@ export async function updateArtifacts({
   config,
 }: UpdateArtifact): Promise<UpdateArtifactsResult[] | null> {
   logger.debug(`poetry.updateArtifacts(${packageFileName})`);
-  if (!is.nonEmptyArray(updatedDeps) && !config.isLockFileMaintenance) {
+  const isLockFileMaintenance = config.updateType === 'lockFileMaintenance';
+
+  if (!is.nonEmptyArray(updatedDeps) && !isLockFileMaintenance) {
     logger.debug('No updated poetry deps - returning null');
     return null;
   }
@@ -111,7 +113,7 @@ export async function updateArtifacts({
   try {
     await writeLocalFile(packageFileName, newPackageFileContent);
     const cmd: string[] = [];
-    if (config.isLockFileMaintenance) {
+    if (isLockFileMaintenance) {
       await deleteLocalFile(lockFileName);
       cmd.push('poetry update --lock --no-interaction');
     } else {