diff --git a/src/testdir/test_channel.vim b/src/testdir/test_channel.vim
index a60147b..d65e528 100644
--- a/src/testdir/test_channel.vim
+++ b/src/testdir/test_channel.vim
@@ -538,6 +538,9 @@
     call assert_equal("this", ch_readraw(handle))
     call assert_equal("AND this", ch_readraw(handle))
 
+    call ch_sendraw(handle, "split this line\n")
+    call assert_equal("this linethis linethis line", ch_readraw(handle))
+
     let reply = ch_evalraw(handle, "quit\n")
     call assert_equal("Goodbye!", reply)
   finally
diff --git a/src/testdir/test_channel_pipe.py b/src/testdir/test_channel_pipe.py
index 5f32506..639cc6c 100644
--- a/src/testdir/test_channel_pipe.py
+++ b/src/testdir/test_channel_pipe.py
@@ -6,6 +6,7 @@
 
 from __future__ import print_function
 import sys
+import time
 
 if __name__ == "__main__":
 
@@ -31,6 +32,15 @@
         if typed.startswith("double "):
             print(typed[7:-1] + "\nAND " + typed[7:-1])
             sys.stdout.flush()
+        if typed.startswith("split "):
+            print(typed[6:-1], end='')
+            sys.stdout.flush()
+            time.sleep(0.05)
+            print(typed[6:-1], end='')
+            sys.stdout.flush()
+            time.sleep(0.05)
+            print(typed[6:-1])
+            sys.stdout.flush()
         if typed.startswith("echoerr "):
             print(typed[8:-1], file=sys.stderr)
             sys.stderr.flush()