diff --git a/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/sync/TestSocketTimeout.java b/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/sync/TestSocketTimeout.java
index 2c8194231f..49486c6b4d 100644
--- a/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/sync/TestSocketTimeout.java
+++ b/httpclient5-testing/src/test/java/org/apache/hc/client5/testing/sync/TestSocketTimeout.java
@@ -112,7 +112,7 @@ void testReadTimeouts(final String param) throws Exception {
 
         assertTrue(actualDelayMs > expectedDelayMs / 2,
             format("Socket read timed out too soon (only %,d out of %,d ms)", actualDelayMs, expectedDelayMs));
-        assertTrue(actualDelayMs < expectedDelayMs * 2,
+        assertTrue(actualDelayMs < expectedDelayMs * 3,
             format("Socket read timed out too late (%,d out of %,d ms)", actualDelayMs, expectedDelayMs));
     }
 }