diff --git a/tests/test_utils.py b/tests/test_utils.py
index 21488d28..56d29ec8 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -2,7 +2,7 @@ import pytest
 from mock import Mock
 from thefuck.utils import sudo_support, wrap_settings, memoize, get_closest
 from thefuck.types import Settings
-from tests.utils import Command
+from tests.utils import Command, no_memoize
 
 
 @pytest.mark.parametrize('override, old, new', [
@@ -34,6 +34,15 @@ def test_memoize():
     fn.assert_called_once_with()
 
 
+@pytest.mark.usefixtures('no_memoize')
+def test_no_memoize():
+    fn = Mock(__name__='fn')
+    memoized = memoize(fn)
+    memoized()
+    memoized()
+    assert fn.call_count == 2
+
+
 class TestGetClosest(object):
 
     def test_when_can_match(self):
diff --git a/tests/utils.py b/tests/utils.py
index 4641971d..0f0f0fd5 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -1,3 +1,4 @@
+import pytest
 from thefuck import types
 from thefuck.conf import DEFAULT_PRIORITY
 
@@ -14,3 +15,7 @@ def Rule(name='', match=lambda *_: True,
     return types.Rule(name, match, get_new_command,
                       enabled_by_default, side_effect,
                       priority)
+
+@pytest.fixture
+def no_memoize(monkeypatch):
+    monkeypatch.setattr('thefuck.utils.memoize.disabled', True)
diff --git a/thefuck/utils.py b/thefuck/utils.py
index 91ef1ed3..2f58e527 100644
--- a/thefuck/utils.py
+++ b/thefuck/utils.py
@@ -80,12 +80,13 @@ def memoize(fn):
     @wraps(fn)
     def wrapper(*args, **kwargs):
         key = pickle.dumps((args, kwargs))
-        if key not in memo:
+        if key not in memo or memoize.disabled:
             memo[key] = fn(*args, **kwargs)
 
         return memo[key]
 
     return wrapper
+memoize.disabled = False
 
 
 def get_closest(word, possibilities, n=3, cutoff=0.6):