diff --git a/slf4j-api/src/test/java/org/slf4j/testHarness/MultithreadedInitializationTest.java b/slf4j-api/src/test/java/org/slf4j/testHarness/MultithreadedInitializationTest.java
index 09d57a84..0db3c23b 100644
--- a/slf4j-api/src/test/java/org/slf4j/testHarness/MultithreadedInitializationTest.java
+++ b/slf4j-api/src/test/java/org/slf4j/testHarness/MultithreadedInitializationTest.java
@@ -36,7 +36,7 @@ abstract public class MultithreadedInitializationTest {
 
         assertAllSubstLoggersAreFixed();
         long recordedEventCount = getRecordedEventCount();
-        int LENIENCY_COUNT = 20;
+        int LENIENCY_COUNT = 21;
 
         long expectedEventCount = eventCount.get() + extraLogEvents();