diff --git a/pyproject.toml b/pyproject.toml
index d1921f3a..b352d26d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,8 @@ select = [
 	# flake8-simplify
 	# Use 'key in dict' instead of 'key in dict.keys()'.
 	"SIM118",
+	# Use 'a != b' instead of 'not a == b'.
+	"SIM201",
 ]
 ignore = [
 	# Line too long.
diff --git a/tools/ratbagctl.devel.py.in b/tools/ratbagctl.devel.py.in
index 831fbda2..b7a33f9b 100755
--- a/tools/ratbagctl.devel.py.in
+++ b/tools/ratbagctl.devel.py.in
@@ -33,7 +33,7 @@ from ratbagctl import RatbagCapabilityError  # NOQA
 
 
 def main(argv, start_ratbagd=True):
-    if not os.geteuid() == 0:
+    if os.geteuid() != 0:
         sys.exit("Script must be run as root")
 
         # replaced by meson
diff --git a/tools/ratbagctl.test.py.in b/tools/ratbagctl.test.py.in
index f31b9ac1..21568c06 100755
--- a/tools/ratbagctl.test.py.in
+++ b/tools/ratbagctl.test.py.in
@@ -917,7 +917,7 @@ def parse(input_string):
     run_ratbagctl_in_subprocess = ns.subprocess
     start_ratbagd = not ns.use_existing
 
-    if start_ratbagd and not os.geteuid() == 0:
+    if start_ratbagd and os.geteuid() != 0:
         print("Script must be run as root", file=sys.stderr)
         sys.exit(77)