diff --git a/src/_pytest/fixtures.py b/src/_pytest/fixtures.py
index ffaa1b09a..21de82b02 100644
--- a/src/_pytest/fixtures.py
+++ b/src/_pytest/fixtures.py
@@ -1013,7 +1013,7 @@ class FixtureFunctionMarker(object):
 
     def __call__(self, function):
         if isclass(function):
-            raise ValueError("class fixtures not supported (may be in the future)")
+            raise ValueError("class fixtures not supported (maybe in the future)")
 
         if getattr(function, "_pytestfixturefunction", False):
             raise ValueError(
@@ -1366,8 +1366,7 @@ class FixtureManager(object):
             fixturedefs = self._arg2fixturedefs[argname]
         except KeyError:
             return None
-        else:
-            return tuple(self._matchfactories(fixturedefs, nodeid))
+        return tuple(self._matchfactories(fixturedefs, nodeid))
 
     def _matchfactories(self, fixturedefs, nodeid):
         for fixturedef in fixturedefs:
diff --git a/src/_pytest/main.py b/src/_pytest/main.py
index ce07285a4..5ad91dfc4 100644
--- a/src/_pytest/main.py
+++ b/src/_pytest/main.py
@@ -564,9 +564,7 @@ class Session(nodes.FSCollector):
         return True
 
     def _tryconvertpyarg(self, x):
-        """Convert a dotted module name to path.
-
-        """
+        """Convert a dotted module name to path."""
         try:
             with _patched_find_module():
                 loader = pkgutil.find_loader(x)
@@ -598,8 +596,7 @@ class Session(nodes.FSCollector):
                 raise UsageError(
                     "file or package not found: " + arg + " (missing __init__.py?)"
                 )
-            else:
-                raise UsageError("file not found: " + arg)
+            raise UsageError("file not found: " + arg)
         parts[0] = path
         return parts
 
diff --git a/src/_pytest/pytester.py b/src/_pytest/pytester.py
index a50999172..e3bf060e3 100644
--- a/src/_pytest/pytester.py
+++ b/src/_pytest/pytester.py
@@ -19,7 +19,7 @@ from _pytest.capture import MultiCapture, SysCapture
 from _pytest._code import Source
 import py
 import pytest
-from _pytest.main import Session, EXIT_OK
+from _pytest.main import Session, EXIT_INTERRUPTED, EXIT_OK
 from _pytest.assertion.rewrite import AssertionRewritingHook
 from _pytest.compat import Path
 from _pytest.compat import safe_str
@@ -845,7 +845,7 @@ class Testdir(object):
 
             # typically we reraise keyboard interrupts from the child run
             # because it's our user requesting interruption of the testing
-            if ret == 2 and not kwargs.get("no_reraise_ctrlc"):
+            if ret == EXIT_INTERRUPTED and not kwargs.get("no_reraise_ctrlc"):
                 calls = reprec.getcalls("pytest_keyboard_interrupt")
                 if calls and calls[-1].excinfo.type == KeyboardInterrupt:
                     raise KeyboardInterrupt()