diff --git a/test/unit/org/apache/cassandra/tools/BulkLoaderTest.java b/test/unit/org/apache/cassandra/tools/BulkLoaderTest.java
index d909913a1e..be7383c796 100644
--- a/test/unit/org/apache/cassandra/tools/BulkLoaderTest.java
+++ b/test/unit/org/apache/cassandra/tools/BulkLoaderTest.java
@@ -93,7 +93,9 @@ public class BulkLoaderTest extends OfflineToolUtils
                                                         "globalEventExecutor-[1-9]-[1-9]",
                                                         "globalEventExecutor-[1-9]-[1-9]",
                                                         "Shutdown-checker",
-                                                        "cluster[0-9]-connection-reaper-[0-9]" });
+                                                        "cluster[0-9]-connection-reaper-[0-9]",
+                                                        // the driver isn't expected to terminate threads on close synchronously (CASSANDRA-19000)
+                                                        "cluster[0-9]-nio-worker-[0-9]" });
         assertSchemaNotLoaded();
         assertCLSMNotLoaded();
         assertSystemKSNotLoaded();