diff --git a/keymapper/dev/injector.py b/keymapper/dev/injector.py
index a7441cef..945bdc1d 100644
--- a/keymapper/dev/injector.py
+++ b/keymapper/dev/injector.py
@@ -89,6 +89,8 @@ class KeycodeInjector:
     make running multiple injector easier. There is one procss per
     hardware-device that is being mapped.
     """
+    regrab_timeout = 0.5
+
     def __init__(self, device, mapping):
         """Start injecting keycodes based on custom_mapping.
 
@@ -198,7 +200,7 @@ class KeycodeInjector:
                 logger.error('Cannot grab %s, it is possibly in use', path)
                 return None, False
 
-            time.sleep(0.5)
+            time.sleep(self.regrab_timeout)
 
         return device, abs_to_rel
 
diff --git a/tests/test.py b/tests/test.py
index 157ff8bd..50548726 100644
--- a/tests/test.py
+++ b/tests/test.py
@@ -37,6 +37,7 @@ gi.require_version('Gtk', '3.0')
 gi.require_version('GLib', '2.0')
 
 from keymapper.logger import update_verbosity
+from keymapper.dev.injector import KeycodeInjector
 
 
 assert not os.getcwd().endswith('tests')
@@ -281,6 +282,9 @@ def patch_evdev():
             self.device = InputDevice('/dev/input/event40')
             pass
 
+        def capabilities(self, *args, **kwargs):
+            return []
+
         def write(self, type, code, value):
             self.write_count += 1
             event = InputEvent(type, code, value)
@@ -317,6 +321,10 @@ patch_unsaved()
 patch_select()
 
 
+# no need for a high number in tests
+KeycodeInjector.regrab_timeout = 0.15
+
+
 def main():
     update_verbosity(True)
 
diff --git a/tests/testcases/test_keycode_mapper.py b/tests/testcases/test_keycode_mapper.py
index a3ead8e1..fbd6a352 100644
--- a/tests/testcases/test_keycode_mapper.py
+++ b/tests/testcases/test_keycode_mapper.py
@@ -67,6 +67,9 @@ class TestKeycodeMapper(unittest.TestCase):
             def write(self, type, code, value):
                 history.append((type, code, value))
 
+            def capabilities(self, *args, **kwargs):
+                return []
+
             def syn(self):
                 pass