diff --git a/tests/unittest.cpp b/tests/unittest.cpp
index 53f083c07..e78a01384 100644
--- a/tests/unittest.cpp
+++ b/tests/unittest.cpp
@@ -3980,13 +3980,13 @@ TEST_CASE("task_timer")
         b = true;
     });
 
-    this_thread::sleep_for(4 * timer.get_tick_length());
+    this_thread::sleep_for(3 * timer.get_tick_length());
     CHECK(a == false);
     CHECK(b == false);
-    this_thread::sleep_for(2 * timer.get_tick_length());
+    this_thread::sleep_for(3 * timer.get_tick_length());
     CHECK(a == true);
     CHECK(b == false);
-    this_thread::sleep_for(4 * timer.get_tick_length());
+    this_thread::sleep_for(5 * timer.get_tick_length());
     CHECK(a == true);
     CHECK(b == true);