diff --git a/solr/solrj/src/test/org/apache/solr/common/util/TestTimeSource.java b/solr/solrj/src/test/org/apache/solr/common/util/TestTimeSource.java
index b37f0260ed1..439a38d74cd 100644
--- a/solr/solrj/src/test/org/apache/solr/common/util/TestTimeSource.java
+++ b/solr/solrj/src/test/org/apache/solr/common/util/TestTimeSource.java
@@ -36,14 +36,18 @@ public class TestTimeSource extends SolrTestCaseJ4 {
     long prevTime = ts.getTime();
     long prevEpochTime = ts.getEpochTime();
     long delta = 500000000; // 500 ms
+    long maxDiff = 200000;
+    if (ts instanceof TimeSource.SimTimeSource) {
+      maxDiff = Math.round(maxDiff * ((TimeSource.SimTimeSource)ts).multiplier);
+    }
     for (int i = 0; i < 10; i++) {
       ts.sleep(500);
       long curTime = ts.getTime();
       long curEpochTime = ts.getEpochTime();
       long diff = prevTime + delta - curTime;
-      assertTrue(ts + " time diff=" + diff, diff < 100000);
+      assertTrue(ts + " time diff=" + diff, diff < maxDiff);
       diff = prevEpochTime + delta - curEpochTime;
-      assertTrue(ts + " epochTime diff=" + diff, diff < 100000);
+      assertTrue(ts + " epochTime diff=" + diff, diff < maxDiff);
       prevTime = curTime;
       prevEpochTime = curEpochTime;
     }