diff --git a/test/src/com/xilinx/rapidwright/rwroute/TestRWRoute.java b/test/src/com/xilinx/rapidwright/rwroute/TestRWRoute.java
index fe7dd7093..c4a62f0e2 100644
--- a/test/src/com/xilinx/rapidwright/rwroute/TestRWRoute.java
+++ b/test/src/com/xilinx/rapidwright/rwroute/TestRWRoute.java
@@ -519,7 +519,7 @@ public void testTimingAndWirelengthReport() {
             "xcvu3p,IOB_X0Y47,I,SLICE_X77Y122,FX,100",
 
             // 240 CLB height SLR, no LAG tiles on Y0 (since HBM on bottom edge)
-            "xcu50,SLICE_X38Y239,AQ,SLICE_X38Y240,A1,500"
+            "xcu50,SLICE_X38Y239,AQ,SLICE_X38Y240,A1,400"
     })
     public void testSingleConnection(String partName,
                                      String srcSiteName, String srcPinName,