diff --git a/bellows/__init__.py b/bellows/__init__.py
index bb9399f7..f8be0de2 100644
--- a/bellows/__init__.py
+++ b/bellows/__init__.py
@@ -1,5 +1,5 @@
 MAJOR_VERSION = 0
 MINOR_VERSION = 15
-PATCH_VERSION = "0"
+PATCH_VERSION = "1"
 __short_version__ = "{}.{}".format(MAJOR_VERSION, MINOR_VERSION)
 __version__ = "{}.{}".format(__short_version__, PATCH_VERSION)
diff --git a/bellows/ezsp.py b/bellows/ezsp.py
index 0c0c1e7f..9345cbc2 100644
--- a/bellows/ezsp.py
+++ b/bellows/ezsp.py
@@ -83,7 +83,7 @@ async def version(self):
         ver, stack_type, stack_version = await self._command(
             "version", self.ezsp_version
         )
-        if ver != self.version:
+        if ver != self.ezsp_version:
             self._ezsp_version = ver
             await self._command("version", ver)
             LOGGER.debug("Switched to EZSP protocol version %d", self.ezsp_version)
diff --git a/tests/test_ezsp.py b/tests/test_ezsp.py
index 09678979..bf4a4438 100644
--- a/tests/test_ezsp.py
+++ b/tests/test_ezsp.py
@@ -85,10 +85,14 @@ def test_non_existent_attr_with_list(ezsp_f):
         ezsp_f.__getattr__(("unexpectedly", "hah"))
 
 
-def test_command(ezsp_f):
+@pytest.mark.asyncio
+async def test_command(ezsp_f):
     ezsp_f._gw = mock.MagicMock()
+
     ezsp_f.start_ezsp()
-    ezsp_f._command("version")
+    coro = ezsp_f._command("nop")
+    ezsp_f._awaiting[ezsp_f._seq - 1][2].set_result(True)
+    await coro
     assert ezsp_f._gw.data.call_count == 1
 
 
@@ -247,10 +251,9 @@ def test_callback_exc(ezsp_f):
     assert testcb.call_count == 1
 
 
-def test_change_version(ezsp_f):
-    loop = asyncio.get_event_loop()
-    version = 5
-
+@pytest.mark.asyncio
+@pytest.mark.parametrize("version, call_count", ((4, 1), (5, 2), (6, 2)))
+async def test_change_version(ezsp_f, version, call_count):
     def mockcommand(name, *args):
         assert name == "version"
         ezsp_f.frame_received(b"\x01\x00\x1b")
@@ -258,9 +261,10 @@ def mockcommand(name, *args):
         fut.set_result([version, 2, 2046])
         return fut
 
-    ezsp_f._command = mockcommand
-    loop.run_until_complete(ezsp_f.version())
+    ezsp_f._command = mock.MagicMock(side_effect=mockcommand)
+    await ezsp_f.version()
     assert ezsp_f.ezsp_version == version
+    assert ezsp_f._command.call_count == call_count
 
 
 def test_stop_ezsp(ezsp_f):