diff --git a/scripts/check-code.sh b/scripts/check-code.sh
index 30594a4..f512c75 100755
--- a/scripts/check-code.sh
+++ b/scripts/check-code.sh
@@ -15,6 +15,7 @@ dir_name="$(basename "${src_dir}")"
 python_name="$(echo "${dir_name}" | sed -e 's/-//' | sed -e 's/-/_/g')"
 python_files=(
     "${src_dir}/${python_name}"/*.py
+    "${src_dir}"/tests/*.py
     "${src_dir}/setup.py"
 )
 
diff --git a/tests/test_arguments.py b/tests/test_arguments.py
index 4f47220..0f2d351 100644
--- a/tests/test_arguments.py
+++ b/tests/test_arguments.py
@@ -1,7 +1,6 @@
 """Tests for HermesApp arguments."""
+# pylint: disable=no-member
 import argparse
-import pytest
-import sys
 
 from rhasspyhermes_app import HermesApp
 
@@ -12,7 +11,7 @@ def test_default_arguments(mocker):
 
     assert app.args.host == "localhost"
     assert app.args.port == 1883
-    assert app.args.tls == False
+    assert app.args.tls is False
     assert app.args.username is None
     assert app.args.password is None
 
@@ -38,7 +37,7 @@ def test_arguments_from_cli(mocker):
 
     assert app.args.host == "rhasspy.home"
     assert app.args.port == 8883
-    assert app.args.tls == True
+    assert app.args.tls is True
     assert app.args.username == "rhasspy-hermes-app"
     assert app.args.password == "test"
 
@@ -57,7 +56,7 @@ def test_arguments_in_init(mocker):
 
     assert app.args.host == "rhasspy.home"
     assert app.args.port == 8883
-    assert app.args.tls == True
+    assert app.args.tls is True
     assert app.args.username == "rhasspy-hermes-app"
     assert app.args.password == "test"
 
@@ -133,4 +132,4 @@ def test_if_cli_arguments_overwrite_init_arguments_with_argument_parser(mocker):
     assert app.args.username == "rhasspy-hermes-app"
     assert app.args.password == "test"
     assert app.args.test_argument == "foobar"
-    assert app.args.test_flag == True
+    assert app.args.test_flag is True
diff --git a/tests/test_hotword.py b/tests/test_hotword.py
index 88eae70..86f80de 100644
--- a/tests/test_hotword.py
+++ b/tests/test_hotword.py
@@ -7,9 +7,9 @@
 
 from rhasspyhermes_app import HermesApp
 
-HOTWORD_TOPIC = f"hermes/hotword/test/detected"
+HOTWORD_TOPIC = "hermes/hotword/test/detected"
 HOTWORD = HotwordDetected("test_model")
-HOTWORD_TOPIC2 = f"hermes/hotword/test2/detected"
+HOTWORD_TOPIC2 = "hermes/hotword/test2/detected"
 HOTWORD2 = HotwordDetected("test_model2")
 
 _LOOP = asyncio.get_event_loop()
diff --git a/tests/test_nlu.py b/tests/test_nlu.py
index 9d63202..0121c11 100644
--- a/tests/test_nlu.py
+++ b/tests/test_nlu.py
@@ -7,7 +7,7 @@
 
 from rhasspyhermes_app import HermesApp
 
-INR_TOPIC = f"hermes/nlu/intentNotRecognized"
+INR_TOPIC = "hermes/nlu/intentNotRecognized"
 INR = NluIntentNotRecognized(input="covfefe")
 
 _LOOP = asyncio.get_event_loop()