diff --git a/tests/run_hygiene.py b/tests/run_hygiene.py
index b8c64010..5766c6c7 100644
--- a/tests/run_hygiene.py
+++ b/tests/run_hygiene.py
@@ -6,17 +6,17 @@
 
 def install_requirements():
     print("\nInstalling requirements...")
-    return subprocess.run((sys.executable, "-m", "pip", "install", "--upgrade", "isort", "black"))
+    return subprocess.run((sys.executable, "-m", "pip", "install", "--upgrade", "ruff"))
 
 
-def run_isort():
-    print("\nRunning isort...")
-    return subprocess.run((sys.executable, "-m", "isort", "."))
+def run_ruff_fix():
+    print("\nRunning Ruff check --fix...")
+    return subprocess.run((sys.executable, "-m", "ruff", "check", "--fix"))
 
 
-def run_black():
-    print("\nRunning Black...")
-    return subprocess.run((sys.executable, "-m", "black", "."))
+def run_ruff_format():
+    print("\nRunning Ruff format...")
+    return subprocess.run((sys.executable, "-m", "ruff", "format"))
 
 
 def main():
@@ -26,8 +26,8 @@ def main():
 
     install_requirements().check_returncode()
     results = (
-        run_isort(),
-        run_black(),
+        run_ruff_fix(),
+        run_ruff_format(),
     )
     if sum([result.returncode for result in results]) > 0:
         print("\nOne or more tests failed. See above for details.")