diff --git a/src/testdir/test_channel.py b/src/testdir/test_channel.py
index b5a912c..07a2241 100644
--- a/src/testdir/test_channel.py
+++ b/src/testdir/test_channel.py
@@ -38,15 +38,15 @@
             print("received: {0}".format(received))
 
             # We may receive two messages at once. Take the part up to the
-            # matching "]" (recognized by finding "][").
+            # newline, which should be after the matching "]".
             todo = received
             while todo != '':
-                splitidx = todo.find('][')
+                splitidx = todo.find('\n')
                 if splitidx < 0:
                      used = todo
                      todo = ''
                 else:
-                     used = todo[:splitidx + 1]
+                     used = todo[:splitidx]
                      todo = todo[splitidx + 1:]
                 if used != received:
                     print("using: {0}".format(used))