diff --git a/src/test/java/com/github/dockerjava/netty/exec/AttachContainerCmdExecTest.java b/src/test/java/com/github/dockerjava/netty/exec/AttachContainerCmdExecTest.java
index d3e8094cf..8b5759c69 100644
--- a/src/test/java/com/github/dockerjava/netty/exec/AttachContainerCmdExecTest.java
+++ b/src/test/java/com/github/dockerjava/netty/exec/AttachContainerCmdExecTest.java
@@ -115,7 +115,7 @@ public void onNext(Frame frame) {
                 .withFollowStream(true)
                 .withStdIn(stdin)
                 .exec(callback)
-                .awaitCompletion(15, SECONDS);
+                .awaitCompletion(30, SECONDS);
         callback.close();
 
         assertThat(callback.toString(), containsString(snippet));