diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8962a9b36..75f6e805a 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -13,6 +13,7 @@ repos:
     -   id: end-of-file-fixer
     -   id: check-yaml
     -   id: debug-statements
+        exclude: _pytest/debugging.py
     -   id: flake8
 -   repo: https://github.com/asottile/pyupgrade
     rev: v1.2.0
diff --git a/_pytest/fixtures.py b/_pytest/fixtures.py
index 5bbe94db8..ca1680dd3 100644
--- a/_pytest/fixtures.py
+++ b/_pytest/fixtures.py
@@ -218,7 +218,7 @@ def reorder_items_atscope(items, argkeys_cache, items_by_argkey, scopenum):
                 break
         if no_argkey_group:
             no_argkey_group = reorder_items_atscope(
-                                no_argkey_group, argkeys_cache, items_by_argkey, scopenum + 1)
+                no_argkey_group, argkeys_cache, items_by_argkey, scopenum + 1)
             for item in no_argkey_group:
                 items_done[item] = None
         ignore.add(slicing_argkey)
@@ -682,10 +682,10 @@ class FixtureLookupErrorRepr(TerminalRepr):
         lines = self.errorstring.split("\n")
         if lines:
             tw.line('{}       {}'.format(FormattedExcinfo.fail_marker,
-                                           lines[0].strip()), red=True)
+                                         lines[0].strip()), red=True)
             for line in lines[1:]:
                 tw.line('{}       {}'.format(FormattedExcinfo.flow_marker,
-                                               line.strip()), red=True)
+                                             line.strip()), red=True)
         tw.line()
         tw.line("%s:%d" % (self.filename, self.firstlineno + 1))
 
@@ -854,7 +854,7 @@ class FixtureFunctionMarker(object):
 
         if getattr(function, "_pytestfixturefunction", False):
             raise ValueError(
-                    "fixture is being applied more than once to the same function")
+                "fixture is being applied more than once to the same function")
 
         function._pytestfixturefunction = self
         return function
diff --git a/_pytest/recwarn.py b/_pytest/recwarn.py
index 7f9fcb30a..0f803a624 100644
--- a/_pytest/recwarn.py
+++ b/_pytest/recwarn.py
@@ -227,7 +227,9 @@ class WarningsChecker(WarningsRecorder):
                             if re.compile(self.match_expr).search(str(r.message)):
                                 break
                     else:
-                        fail("DID NOT WARN. No warnings of type {} matching"
-                             " ('{}') was emitted. The list of emitted warnings"
-                             " is: {}.".format(self.expected_warning, self.match_expr,
-                                                [each.message for each in self]))
+                        fail(
+                            "DID NOT WARN. No warnings of type {} matching"
+                            " ('{}') was emitted. The list of emitted warnings"
+                            " is: {}.".format(
+                                self.expected_warning, self.match_expr,
+                                [each.message for each in self]))
diff --git a/testing/test_mark.py b/testing/test_mark.py
index f79baf0fc..ae8fe79b2 100644
--- a/testing/test_mark.py
+++ b/testing/test_mark.py
@@ -747,8 +747,10 @@ class TestFunctional(object):
         items = {x.name: x for x in items}
         for name, expected_markers in expected.items():
             markers = items[name].keywords._markers
-            marker_names = {name for (name, v) in markers.items()
-                                if isinstance(v, MarkInfo)}
+            marker_names = {
+                name for (name, v) in markers.items()
+                if isinstance(v, MarkInfo)
+            }
             assert marker_names == set(expected_markers)
 
     @pytest.mark.issue1540