Correcting test tolerance

Author: benjivesterby

README.md

@@ -39,7 +39,7 @@ cache := ttl.NewCache(
 )
 ```
 
-The `NewCache` method returns the `ttl.Cache` interface which defines the expected API for storing and accessing data in the cache. 
+The `NewCache` method returns the `ttl.Cache` interface which defines the expected API for storing and accessing data in the cache.
 
 ### Add Data to Cache
 
@@ -65,4 +65,4 @@ As with Get, Delete uses a similar pattern to `sync.Map`.
 
 `cache.Delete(ctx, key)`
 
-This deletes the key from the map as well as shuts down the backend routines running that key's processing.
+This deletes the key from the map as well as shuts down the backend routines running that key's processing.

cache_exported_test.go

@@ -435,7 +435,7 @@ func Test_Set_extension(t *testing.T) {
 		"500ms -> 3s": {
 			time.Millisecond * 500,
 			time.Second * 3,
-			time.Millisecond,
+			time.Millisecond * 50,
 		},
 		"1s -> 5s": {
 			time.Second,