diff --git a/src/main.ts b/src/main.ts
index 993fdde7..c3c89efd 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -186,7 +186,7 @@ class TestReporter {
     const passed = results.reduce((sum, tr) => sum + tr.passed, 0)
     const failed = results.reduce((sum, tr) => sum + tr.failed, 0)
     const skipped = results.reduce((sum, tr) => sum + tr.skipped, 0)
-    let shortSummary = `${passed} passed, ${failed} failed and ${skipped} skipped `
+    const shortSummary = `${passed} passed, ${failed} failed and ${skipped} skipped `
 
     core.info(`Updating check run conclusion (${conclusion}) and output`)
     const resp = await this.octokit.rest.checks.update({