fixed tests as per pr comment

IPython/kernel/tests/test_message_spec.py

@@ -405,6 +405,7 b' def test_single_payload():'
 
 def test_is_complete():
     flush_channels()
+
     msg_id = KC.is_complete("a = 1")
     reply = KC.get_shell_msg(timeout=TIMEOUT)
     validate_message(reply, 'is_complete_reply', msg_id)
@@ -412,6 +413,9 b' def test_is_complete():'
 def test_history_range():
     flush_channels()
     
+    msg_id_exec = KC.execute(code='x=1', store_history = True)
+    reply_exec = KC.get_shell_msg(timeout=TIMEOUT)
+    
     msg_id = KC.history(hist_access_type = 'range', raw = True, output = True, start = 1, stop = 2, session = 0)
     reply = KC.get_shell_msg(timeout=TIMEOUT)
     validate_message(reply, 'history_reply', msg_id)
@@ -421,6 +425,9 b' def test_history_range():'
 def test_history_tail():
     flush_channels()
     
+    msg_id_exec = KC.execute(code='x=1', store_history = True)
+    reply_exec = KC.get_shell_msg(timeout=TIMEOUT)
+    
     msg_id = KC.history(hist_access_type = 'tail', raw = True, output = True, n = 1, session = 0)
     reply = KC.get_shell_msg(timeout=TIMEOUT)
     validate_message(reply, 'history_reply', msg_id)
@@ -430,6 +437,9 b' def test_history_tail():'
 def test_history_search():
     flush_channels()
     
+    msg_id_exec = KC.execute(code='x=1', store_history = True)
+    reply_exec = KC.get_shell_msg(timeout=TIMEOUT)
+    
     msg_id = KC.history(hist_access_type = 'search', raw = True, output = True, n = 1, pattern = '*', session = 0)
     reply = KC.get_shell_msg(timeout=TIMEOUT)
     validate_message(reply, 'history_reply', msg_id)