Fix for intermittently failing test.
diff --git a/app/src/test/java/org/apache/roller/weblogger/util/IPBanListTest.java b/app/src/test/java/org/apache/roller/weblogger/util/IPBanListTest.java
index d4ecedb..b7d0579 100644
--- a/app/src/test/java/org/apache/roller/weblogger/util/IPBanListTest.java
+++ b/app/src/test/java/org/apache/roller/weblogger/util/IPBanListTest.java
@@ -91,7 +91,9 @@
     @DisplayName("isBanned() reads the file if needed")
     void isBanned4() {
         writeIpBanList("10.0.0.1");
-
+        try { // work around for intermittently failing test
+            Thread.sleep(500);
+        } catch (InterruptedException ignored) {}
         assertTrue(ipBanList.isBanned("10.0.0.1"));
     }