diff --git a/README.md b/README.md
index 0418e3a1..9e7912bb 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ For a list of supported keystrokes and their names, check the output of
 `xmodmap -pke`
 
 Maybe you shouldn't use this feature in online PVP though. Might even get
-detected by the game.
+detected by your game.
 
 ## Git Installation
 
@@ -84,6 +84,6 @@ sudo python3 setup.py install && python3 tests/test.py
 - [x] highlight changes and alert before discarding unsaved changes
 - [x] automatically load presets on login for plugged in devices
 - [x] make sure it works on wayland
-- [ ] support timed macros, maybe using some sort of syntax
+- [x] support timed macros, maybe using some sort of syntax
 - [ ] add to the AUR, provide .deb and .appimage files
 - [ ] automatically load presets when devices get plugged in after login
diff --git a/keymapper/dev/injector.py b/keymapper/dev/injector.py
index df9bff65..8685ad32 100644
--- a/keymapper/dev/injector.py
+++ b/keymapper/dev/injector.py
@@ -225,7 +225,10 @@ class KeycodeInjector:
     def _macro_write(self, character, value, keymapper_device):
         """Handler for macros."""
         keycode = system_mapping.get_keycode(character)
-        logger.spam('macro writes code:%s char:%s', keycode, character)
+        logger.spam(
+            'macro writes code:%s value:%d char:%s',
+            keycode, value, character
+        )
         self._write(keymapper_device, keycode, value)
 
     async def _injection_loop(self, device, keymapper_device):
@@ -271,8 +274,7 @@ class KeycodeInjector:
             if character is None:
                 # unknown keycode, forward it
                 target_keycode = input_keycode
-            elif '(' in character:
-                # must be a macro
+            elif macros.get(input_keycode) is not None:
                 if event.value == 0:
                     continue
 
@@ -283,7 +285,6 @@ class KeycodeInjector:
                     character
                 )
                 macro = macros.get(input_keycode)
-                # TODO test if m(SHIFT_L, k(a)) prints A in injector tests
                 if macro is not None:
                     asyncio.ensure_future(macro.run())
                 continue
diff --git a/tests/test.py b/tests/test.py
index a75a446a..ae183f8c 100644
--- a/tests/test.py
+++ b/tests/test.py
@@ -217,6 +217,14 @@ def patch_dbus():
     dbus.Interface = lambda *args: Daemon()
 
 
+def clear_write_history():
+    """Empty the history in preparation for the next test."""
+    while len(uinput_write_history) > 0:
+        uinput_write_history.pop()
+    while uinput_write_history_pipe[0].poll():
+        uinput_write_history_pipe[0].recv()
+
+
 # quickly fake some stuff before any other file gets a chance to import
 # the original versions
 patch_paths()
diff --git a/tests/testcases/injector.py b/tests/testcases/injector.py
index 69e4eecd..296c0a4d 100644
--- a/tests/testcases/injector.py
+++ b/tests/testcases/injector.py
@@ -28,7 +28,8 @@ from keymapper.dev.injector import is_numlock_on, toggle_numlock,\
 from keymapper.state import custom_mapping, system_mapping
 from keymapper.mapping import Mapping
 
-from test import uinput_write_history, Event, pending_events, fixtures
+from test import uinput_write_history, Event, pending_events, fixtures, \
+    clear_write_history
 
 
 class TestInjector(unittest.TestCase):
@@ -54,6 +55,7 @@ class TestInjector(unittest.TestCase):
         evdev.InputDevice.grab = self.grab
         if pending_events.get('device 2') is not None:
             del pending_events['device 2']
+        clear_write_history()
 
     def test_modify_capabilities(self):
         class FakeDevice:
@@ -157,7 +159,7 @@ class TestInjector(unittest.TestCase):
         ]
 
         self.injector = KeycodeInjector('device 2', custom_mapping)
-        # don't start the process for coverage testing purposes
+        # don't start as process for coverage testing purposes
         self.injector._start_injecting()
 
         self.assertEqual(len(uinput_write_history), 7)
diff --git a/tests/testcases/integration.py b/tests/testcases/integration.py
index 97c7cfdf..6d3ef00a 100644
--- a/tests/testcases/integration.py
+++ b/tests/testcases/integration.py
@@ -37,7 +37,8 @@ from keymapper.state import custom_mapping, system_mapping
 from keymapper.paths import CONFIG
 from keymapper.config import config
 
-from test import tmp, pending_events, Event, uinput_write_history_pipe
+from test import tmp, pending_events, Event, uinput_write_history_pipe, \
+    clear_write_history
 
 
 def gtk_iteration():
@@ -101,6 +102,7 @@ class Integration(unittest.TestCase):
         self.window.window.destroy()
         gtk_iteration()
         shutil.rmtree('/tmp/key-mapper-test')
+        clear_write_history()
 
     def get_rows(self):
         return self.window.get('key_list').get_children()
@@ -285,7 +287,7 @@ class Integration(unittest.TestCase):
 
     def test_start_injecting(self):
         keycode_from = 9
-        keycode_to = 100
+        keycode_to = 200
 
         self.change_empty_row(keycode_from, 'a')
         system_mapping.empty()