diff --git a/pre_commit_hooks/debug_statement_hook.py b/pre_commit_hooks/debug_statement_hook.py
index 5f16727..565740e 100644
--- a/pre_commit_hooks/debug_statement_hook.py
+++ b/pre_commit_hooks/debug_statement_hook.py
@@ -4,6 +4,8 @@
 import collections
 import sys
 
+from pre_commit_hooks.util import entry
+
 
 DEBUG_STATEMENTS = set(['pdb', 'ipdb', 'pudb'])
 
@@ -43,6 +45,7 @@
         return 0
 
 
+@entry
 def debug_statement_hook(argv):
     parser = argparse.ArgumentParser()
     parser.add_argument('filenames', nargs='*', help='Filenames to run')
@@ -55,9 +58,5 @@
     return retv
 
 
-def entry():
-    return debug_statement_hook(sys.argv[1:])
-
-
 if __name__ == '__main__':
-    sys.exit(entry())
\ No newline at end of file
+    sys.exit(debug_statement_hook())
diff --git a/pre_commit_hooks/tests_should_end_in_test.py b/pre_commit_hooks/tests_should_end_in_test.py
index 92f2031..37db03c 100644
--- a/pre_commit_hooks/tests_should_end_in_test.py
+++ b/pre_commit_hooks/tests_should_end_in_test.py
@@ -3,7 +3,10 @@
 
 import sys
 
+from pre_commit_hooks.util import entry
 
+
+@entry
 def validate_files(argv):
     retcode = 0
     for filename in argv:
@@ -18,9 +21,5 @@
     return retcode
 
 
-def entry():
-    return validate_files(sys.argv[1:])
-
-
 if __name__ == '__main__':
     sys.exit(entry())
diff --git a/pre_commit_hooks/trailing_whitespace_fixer.py b/pre_commit_hooks/trailing_whitespace_fixer.py
index 5038e6e..bf016af 100644
--- a/pre_commit_hooks/trailing_whitespace_fixer.py
+++ b/pre_commit_hooks/trailing_whitespace_fixer.py
@@ -3,7 +3,10 @@
 import sys
 from plumbum import local
 
+from pre_commit_hooks.util import entry
 
+
+@entry
 def fix_trailing_whitespace(argv):
     parser = argparse.ArgumentParser()
     parser.add_argument('filenames', nargs='*', help='Filenames to fix')
@@ -22,9 +25,5 @@
         return 0
 
 
-def entry():
-    fix_trailing_whitespace(sys.argv[1:])
-
-
 if __name__ == '__main__':
-    sys.exit(entry())
+    sys.exit(fix_trailing_whitespace())
diff --git a/pre_commit_hooks/util.py b/pre_commit_hooks/util.py
new file mode 100644
index 0000000..22d13c4
--- /dev/null
+++ b/pre_commit_hooks/util.py
@@ -0,0 +1,16 @@
+
+import functools
+import sys
+
+
+def entry(func):
+    """Allows a function that has `argv` as an argument to be used as a
+    commandline entry.  This will make the function callable using either
+    explicitly passed argv or defaulting to sys.argv[1:]
+    """
+    @functools.wraps(func)
+    def wrapper(argv=None):
+        if argv is None:
+            argv = sys.argv[1:]
+        return func(argv)
+    return wrapper