diff --git a/progress_test.go b/progress_test.go
index 0440271..e7c403a 100644
--- a/progress_test.go
+++ b/progress_test.go
@@ -149,7 +149,7 @@
 					}
 				}
 				time.Sleep((time.Duration(rng.Intn(10)+1) * (50 * time.Millisecond)) / 2)
-				bar.Increment()
+				bar.IncrInt64(rand.Int63n(5) + 1)
 				bar.DecoratorEwmaUpdate(time.Since(start))
 			}
 		}()