diff --git a/pre_commit/commands/hook_impl.py b/pre_commit/commands/hook_impl.py
index f5995e9a..54ab169d 100644
--- a/pre_commit/commands/hook_impl.py
+++ b/pre_commit/commands/hook_impl.py
@@ -100,6 +100,7 @@ def _ns(
         rewrite_command=rewrite_command,
         files=(),
         hook=None,
+        tags=(),
         verbose=False,
         show_diff_on_failure=False,
     )
diff --git a/pre_commit/commands/run.py b/pre_commit/commands/run.py
index a768cd4a..47ba34aa 100644
--- a/pre_commit/commands/run.py
+++ b/pre_commit/commands/run.py
@@ -11,6 +11,7 @@ import time
 import unicodedata
 from typing import Any
 from typing import Collection
+from typing import Iterable
 from typing import MutableMapping
 from typing import Sequence
 
@@ -323,26 +324,29 @@ def _has_unstaged_config(config_file: str) -> bool:
     # be explicit, other git errors don't mean it has an unstaged config.
     return retcode == 1
 
+
 def _hook_should_run(args: argparse.Namespace, hook: Hook) -> bool:
     if args.hook_stage not in hook.stages:
         return False
 
     if args.tags:
         return len(set(hook.tags) & set(args.tags)) > 0
-    
+
     return (
-        not args.hook
-        or hook.id == args.hook
-        or hook.alias == args.hook
+        not args.hook or
+        hook.id == args.hook or
+        hook.alias == args.hook
     )
 
-def _hook_is_skipped(skips: Sequence[str], hook: Hook) -> bool:
+
+def _hook_is_skipped(skips: Iterable[str], hook: Hook) -> bool:
     return (
-        hook.id in skips
-        or hook.alias in skips
-        or len(set(hook.tags) & set(skips)) > 0
+        hook.id in skips or
+        hook.alias in skips or
+        len(set(hook.tags) & set(skips)) > 0
     )
 
+
 def run(
         config_file: str,
         store: Store,
@@ -438,7 +442,8 @@ def run(
             return 1
         if args.tags and not hooks:
             output.write_line(
-                f'No hooks with tags matching `{args.tags}` in stage `{args.hook_stage}`'
+                f'No hooks with tags matching `{args.tags}` '
+                f'in stage `{args.hook_stage}`',
             )
             return 1
 
diff --git a/testing/resources/script_hooks_repo/.pre-commit-hooks.yaml b/testing/resources/script_hooks_repo/.pre-commit-hooks.yaml
index ec1f3fb6..7519b09f 100644
--- a/testing/resources/script_hooks_repo/.pre-commit-hooks.yaml
+++ b/testing/resources/script_hooks_repo/.pre-commit-hooks.yaml
@@ -4,4 +4,4 @@
     language: script
     files: ''
     tags:
-    -   foo 
+    -   foo
diff --git a/tests/commands/run_test.py b/tests/commands/run_test.py
index 37fbef95..b73a6b5b 100644
--- a/tests/commands/run_test.py
+++ b/tests/commands/run_test.py
@@ -144,14 +144,21 @@ def _do_run(cap_out, store, repo, args, environ={}, config_file=C.CONFIG_FILE):
 
 def _test_run(
     cap_out, store, repo, opts, expected_outputs, expected_ret, stage,
-    config_file=C.CONFIG_FILE, environ_override=None
+    config_file=C.CONFIG_FILE, environ_override=None,
 ):
     if stage:
         stage_a_file()
     if environ_override is None:
         environ_override = {}
     args = run_opts(**opts)
-    ret, printed = _do_run(cap_out, store, repo, args, config_file=config_file, environ=environ_override)
+    ret, printed = _do_run(
+        cap_out,
+        store,
+        repo,
+        args,
+        config_file=config_file,
+        environ=environ_override,
+    )
 
     assert ret == expected_ret, (ret, expected_ret, printed)
     for expected_output_part in expected_outputs:
@@ -369,13 +376,19 @@ def test_show_diff_on_failure(
         ),
         (
             {'tags': ['bar', 'baz']},
-            (b'No hooks with tags matching `[\'bar\', \'baz\']` in stage `commit`',),
+            (
+                b'No hooks with tags matching `[\'bar\', \'baz\']`',
+                b'in stage `commit`',
+            ),
             1,
             True,
         ),
         (
             {'tags': ['bar', 'baz'], 'hook_stage': 'push'},
-            (b'No hooks with tags matching `[\'bar\', \'baz\']` in stage `push`',),
+            (
+                b'No hooks with tags matching `[\'bar\', \'baz\']`',
+                b'in stage `push`',
+            ),
             1,
             True,
         ),
@@ -633,6 +646,7 @@ def test_skip_aliased_hook(cap_out, store, aliased_repo):
     for msg in (b'Bash hook', b'Skipped'):
         assert printed.count(msg) == 1
 
+
 def test_skip_tag(cap_out, store, repo_with_passing_hook):
     _test_run(
         cap_out,
@@ -642,7 +656,7 @@ def test_skip_tag(cap_out, store, repo_with_passing_hook):
         (b'Bash hook', b'Skipped'),
         0,
         True,
-        environ_override={'SKIP': 'foo'}
+        environ_override={'SKIP': 'foo'},
     )