diff --git a/python/servo/devtools_tests.py b/python/servo/devtools_tests.py
index 825f52eb3b0..556350d73a3 100644
--- a/python/servo/devtools_tests.py
+++ b/python/servo/devtools_tests.py
@@ -317,9 +317,23 @@ class DevtoolsTests(unittest.IsolatedAsyncioTestCase):
         return os.path.join(DevtoolsTests.script_path, os.path.join("devtools_tests", path))
 
 
-def run_tests(script_path, build_type: BuildType):
+def run_tests(script_path, build_type: BuildType, test_names: list[str]):
     DevtoolsTests.script_path = script_path
     DevtoolsTests.build_type = build_type
     verbosity = 1 if logging.getLogger().level >= logging.WARN else 2
-    suite = unittest.TestLoader().loadTestsFromTestCase(DevtoolsTests)
+    loader = unittest.TestLoader()
+    if test_names:
+        patterns = []
+        # unittest.main() `-k` treats any `pattern` not containing `*` like `*pattern*`
+        for pattern in test_names:
+            if "*" in pattern:
+                patterns.append(pattern)
+            else:
+                patterns.append(f"*{pattern}*")
+        loader.testNamePatterns = patterns
+    suite = loader.loadTestsFromTestCase(DevtoolsTests)
+    print(f"Running {suite.countTestCases()} tests:")
+    for test in suite:
+        print(f"- {test}")
+    print()
     return unittest.TextTestRunner(verbosity=verbosity).run(suite).wasSuccessful()
diff --git a/python/servo/testing_commands.py b/python/servo/testing_commands.py
index 5fdc3b9b0db..4ed241aea49 100644
--- a/python/servo/testing_commands.py
+++ b/python/servo/testing_commands.py
@@ -355,10 +355,11 @@ class MachCommands(CommandBase):
         return 0 if passed else 1
 
     @Command("test-devtools", description="Run tests for devtools.", category="testing")
+    @CommandArgument("test_names", nargs=argparse.REMAINDER, help="Only run tests that match these patterns")
     @CommandBase.common_command_arguments(build_type=True)
-    def test_devtools(self, build_type: BuildType, **kwargs) -> int:
+    def test_devtools(self, build_type: BuildType, test_names: list[str], **kwargs) -> int:
         print("Running devtools tests...")
-        passed = servo.devtools_tests.run_tests(SCRIPT_PATH, build_type)
+        passed = servo.devtools_tests.run_tests(SCRIPT_PATH, build_type, test_names)
         return 0 if passed else 1
 
     @Command(