diff --git a/molecule/default/tests/conftest.py b/molecule/default/tests/conftest.py
index 7bd2743..ba0f1e8 100644
--- a/molecule/default/tests/conftest.py
+++ b/molecule/default/tests/conftest.py
@@ -16,6 +16,5 @@ def pytest_runtest_setup(item):
         ).get_hosts("all")
     else:
         pytest.skip(
-            "Test should run only from inside molecule.",
-            allow_module_level=True
+            "Test should run only from inside molecule.", allow_module_level=True
         )
diff --git a/molecule/default/tests/test_default.py b/molecule/default/tests/test_default.py
index 9df90df..29437c4 100644
--- a/molecule/default/tests/test_default.py
+++ b/molecule/default/tests/test_default.py
@@ -8,7 +8,7 @@ def test_lvm_package_shall_be_installed(host):
 def test_non_persistent_volume_group_is_created(host):
     command = """sudo vgdisplay | grep -c 'my_vg'"""
     cmd = host.run(command)
-    assert '1' in cmd.stdout
+    assert "1" in cmd.stdout
 
 
 def test_mylv_logical_volume_is_created(host):
diff --git a/molecule/kvmonlyvg/tests/test_default.py b/molecule/kvmonlyvg/tests/test_default.py
index b03947a..818a795 100644
--- a/molecule/kvmonlyvg/tests/test_default.py
+++ b/molecule/kvmonlyvg/tests/test_default.py
@@ -8,4 +8,4 @@ def test_lvm_package_shall_be_installed(host):
 def test_non_persistent_volume_group_is_created(host):
     command = """sudo vgdisplay | grep -c 'my_vg'"""
     cmd = host.run(command)
-    assert '1' in cmd.stdout
+    assert "1" in cmd.stdout
diff --git a/molecule/kvmsinglelv/tests/test_default.py b/molecule/kvmsinglelv/tests/test_default.py
index ad9e53a..19945ac 100644
--- a/molecule/kvmsinglelv/tests/test_default.py
+++ b/molecule/kvmsinglelv/tests/test_default.py
@@ -8,7 +8,7 @@ def test_lvm_package_shall_be_installed(host):
 def test_non_persistent_volume_group_is_created(host):
     command = """sudo vgdisplay | grep -c 'my_vg'"""
     cmd = host.run(command)
-    assert '1' in cmd.stdout
+    assert "1" in cmd.stdout
 
 
 def test_mylv_logical_volume_is_created(host):