diff --git a/definitions/npm/jest_v26.x.x/flow_v0.104.x-/jest_v26.x.x.js b/definitions/npm/jest_v26.x.x/flow_v0.104.x-/jest_v26.x.x.js
index 106c30dd43..c131f94c30 100644
--- a/definitions/npm/jest_v26.x.x/flow_v0.104.x-/jest_v26.x.x.js
+++ b/definitions/npm/jest_v26.x.x/flow_v0.104.x-/jest_v26.x.x.js
@@ -908,7 +908,7 @@ type JestObjectType = {
    * (setTimeout, setInterval, clearTimeout, clearInterval, nextTick,
    * setImmediate and clearImmediate).
    */
-  useFakeTimers(): JestObjectType,
+  useFakeTimers(mode?: 'modern' | 'legacy'): JestObjectType,
   /**
    * Instructs Jest to use the real versions of the standard timer functions.
    */