diff --git a/python/servo/testing_commands.py b/python/servo/testing_commands.py
index 59a30207c89..13dd21e9405 100644
--- a/python/servo/testing_commands.py
+++ b/python/servo/testing_commands.py
@@ -13,9 +13,6 @@ import re
 import sys
 import os
 import os.path as path
-import copy
-from collections import OrderedDict
-import time
 import shutil
 import subprocess
 
@@ -24,7 +21,6 @@ import wpt.manifestupdate
 import wpt.run
 import wpt.update
 
-from mach.registrar import Registrar
 from mach.decorators import (
     CommandArgument,
     CommandProvider,
@@ -41,18 +37,6 @@ PROJECT_TOPLEVEL_PATH = os.path.abspath(os.path.join(SCRIPT_PATH, "..", ".."))
 WEB_PLATFORM_TESTS_PATH = os.path.join("tests", "wpt", "tests")
 SERVO_TESTS_PATH = os.path.join("tests", "wpt", "mozilla", "tests")
 
-TEST_SUITES = OrderedDict([
-    ("wpt", {"kwargs": {"release": False},
-             "paths": [path.abspath(WEB_PLATFORM_TESTS_PATH),
-                       path.abspath(SERVO_TESTS_PATH)],
-             "include_arg": "include"}),
-    ("unit", {"kwargs": {},
-              "paths": [path.abspath(path.join("tests", "unit"))],
-              "include_arg": "test_name"}),
-])
-
-TEST_SUITES_BY_PREFIX = {path: k for k, v in TEST_SUITES.items() if "paths" in v for path in v["paths"]}
-
 
 def format_toml_files_with_taplo(check_only: bool = True) -> int:
     taplo = shutil.which("taplo")
@@ -76,72 +60,6 @@ class MachCommands(CommandBase):
         if not hasattr(self.context, "built_tests"):
             self.context.built_tests = False
 
-    @Command('test',
-             description='Run specified Servo tests',
-             category='testing')
-    @CommandArgument('params', default=None, nargs="...",
-                     help="Optionally select test based on "
-                          "test file directory")
-    @CommandArgument('--release', default=False, action="store_true",
-                     help="Run with a release build of servo")
-    @CommandArgument('--all', default=False, action="store_true", dest="all_suites",
-                     help="Run all test suites")
-    def test(self, params, release=False, all_suites=False):
-        suites = copy.deepcopy(TEST_SUITES)
-        suites["wpt"]["kwargs"] = {"release": release}
-        suites["unit"]["kwargs"] = {}
-
-        selected_suites = OrderedDict()
-
-        if params is None:
-            if all_suites:
-                params = suites.keys()
-            else:
-                print("Specify a test path or suite name, or pass --all to run all test suites.\n\nAvailable suites:")
-                for s in suites:
-                    print("    %s" % s)
-                return 1
-
-        for arg in params:
-            found = False
-            if arg in suites and arg not in selected_suites:
-                selected_suites[arg] = []
-                found = True
-            else:
-                suite = self.suite_for_path(arg)
-                if suite is not None:
-                    if suite not in selected_suites:
-                        selected_suites[suite] = []
-                    selected_suites[suite].append(arg)
-                    found = True
-                    break
-
-            if not found:
-                print("%s is not a valid test path or suite name" % arg)
-                return 1
-
-        test_start = time.time()
-        for suite, tests in selected_suites.items():
-            props = suites[suite]
-            kwargs = props.get("kwargs", {})
-            if tests:
-                kwargs[props["include_arg"]] = tests
-
-            Registrar.dispatch("test-%s" % suite, context=self.context, **kwargs)
-
-        elapsed = time.time() - test_start
-
-        print("Tests completed in %0.2fs" % elapsed)
-
-    # Helper to determine which test suite owns the path
-    def suite_for_path(self, path_arg):
-        if os.path.exists(path.abspath(path_arg)):
-            abs_path = path.abspath(path_arg)
-            for prefix, suite in TEST_SUITES_BY_PREFIX.items():
-                if abs_path.startswith(prefix):
-                    return suite
-        return None
-
     @Command('test-perf',
              description='Run the page load performance test',
              category='testing')