diff --git a/src/cache.ts b/src/cache.ts
index c29f295..a06f33f 100644
--- a/src/cache.ts
+++ b/src/cache.ts
@@ -52,12 +52,9 @@ const getIntervalKey = (invalidationIntervalDays: number): string => {
 
 async function buildCacheKeys(): Promise<string[]> {
   const keys = []
-  let cacheKey = `golangci-lint.cache-`
-  keys.push(cacheKey)
-
   // Periodically invalidate a cache because a new code being added.
   // TODO: configure it via inputs.
-  cacheKey += `${getIntervalKey(7)}-`
+  let cacheKey = `golangci-lint.cache-${getIntervalKey(7)}-`
   keys.push(cacheKey)
 
   if (await pathExists(`go.mod`)) {