diff --git a/src/libCom/test/epicsTimerTest.cpp b/src/libCom/test/epicsTimerTest.cpp
index 25264e1e1..a4ab9cccc 100644
--- a/src/libCom/test/epicsTimerTest.cpp
+++ b/src/libCom/test/epicsTimerTest.cpp
@@ -75,7 +75,7 @@ inline double delayVerify::delay () const
 
 double delayVerify::checkError () const
 {
-    const double messageThresh = 1.0; // percent 
+    const double messageThresh = 2.0; // percent 
     double actualDelay =  this->expireStamp - this->beginStamp;
     double measuredError = actualDelay - this->expectedDelay;
     double percentError = 100.0 * fabs ( measuredError ) / this->expectedDelay;