diff --git a/test/framework/src/main/java/org/elasticsearch/test/ESTestCase.java b/test/framework/src/main/java/org/elasticsearch/test/ESTestCase.java
index a0777de5dc3..551735c18a2 100644
--- a/test/framework/src/main/java/org/elasticsearch/test/ESTestCase.java
+++ b/test/framework/src/main/java/org/elasticsearch/test/ESTestCase.java
@@ -892,7 +892,7 @@ public abstract class ESTestCase extends LuceneTestCase {
 
     @BeforeClass
     public static void setUseNio() throws Exception {
-        useNio = randomBoolean();
+        useNio = false;
     }
 
     public static String getTestTransportType() {