diff --git a/irctest/cases.py b/irctest/cases.py
index dedcedf..ea3f06d 100644
--- a/irctest/cases.py
+++ b/irctest/cases.py
@@ -57,6 +57,7 @@ CHANNEL_JOIN_FAIL_NUMERICS = frozenset(
 
 # typevar for decorators
 TCallable = TypeVar("TCallable", bound=Callable)
+TClass = TypeVar("TClass", bound=Type)
 
 # typevar for the client name used by tests (usually int or str)
 TClientName = TypeVar("TClientName", bound=Union[Hashable, int])
@@ -716,6 +717,11 @@ class OptionalityHelper(Generic[TController]):
         return newf
 
 
+def mark_services(cls: TClass) -> TClass:
+    cls.run_services = True
+    return pytest.mark.services(cls)  # type: ignore
+
+
 def mark_specifications(
     *specifications_str: str, deprecated: bool = False, strict: bool = False
 ) -> Callable[[TCallable], TCallable]:
diff --git a/irctest/server_tests/test_account_tag.py b/irctest/server_tests/test_account_tag.py
index c107807..ea909db 100644
--- a/irctest/server_tests/test_account_tag.py
+++ b/irctest/server_tests/test_account_tag.py
@@ -5,9 +5,8 @@
 from irctest import cases
 
 
+@cases.mark_services
 class AccountTagTestCase(cases.BaseServerTestCase, cases.OptionalityHelper):
-    run_services = True
-
     def connectRegisteredClient(self, nick):
         self.addClient()
         self.sendLine(2, "CAP LS 302")
diff --git a/irctest/server_tests/test_bouncer.py b/irctest/server_tests/test_bouncer.py
index 6d60bd2..c22e065 100644
--- a/irctest/server_tests/test_bouncer.py
+++ b/irctest/server_tests/test_bouncer.py
@@ -4,9 +4,8 @@ from irctest.numerics import ERR_NICKNAMEINUSE, RPL_WELCOME
 from irctest.patma import ANYSTR, StrRe
 
 
+@cases.mark_services
 class Bouncer(cases.BaseServerTestCase):
-    run_services = True
-
     @cases.mark_specifications("Ergo")
     def testBouncer(self):
         """Test basic bouncer functionality."""
diff --git a/irctest/server_tests/test_cap.py b/irctest/server_tests/test_cap.py
index aaa9860..7a7b74e 100644
--- a/irctest/server_tests/test_cap.py
+++ b/irctest/server_tests/test_cap.py
@@ -146,7 +146,7 @@ class CapTestCase(cases.BaseServerTestCase, cases.OptionalityHelper):
         enabled_caps = set(cap_list.params[2].split())
         enabled_caps.discard("cap-notify")  # implicitly added by some impls
         self.assertEqual(enabled_caps, {cap1, cap2})
-        self.assertIn("time", cap_list.tags)
+        self.assertIn("time", cap_list.tags, cap_list)
 
         # remove the server-time cap
         self.sendLine(1, f"CAP REQ :-{cap2}")
diff --git a/irctest/server_tests/test_channel_operations.py b/irctest/server_tests/test_channel_operations.py
index ca0977a..8415441 100644
--- a/irctest/server_tests/test_channel_operations.py
+++ b/irctest/server_tests/test_channel_operations.py
@@ -1180,9 +1180,8 @@ class ModeratedMode(cases.BaseServerTestCase):
         )
 
 
+@cases.mark_services
 class RegisteredOnlySpeakMode(cases.BaseServerTestCase):
-    run_services = True
-
     @cases.mark_specifications("Ergo")
     def testRegisteredOnlySpeakMode(self):
         self.controller.registerUser(self, "evan", "sesame")
diff --git a/irctest/server_tests/test_chathistory.py b/irctest/server_tests/test_chathistory.py
index 9108ce1..2f620df 100644
--- a/irctest/server_tests/test_chathistory.py
+++ b/irctest/server_tests/test_chathistory.py
@@ -33,9 +33,8 @@ def validate_chathistory_batch(msgs):
     return result
 
 
+@cases.mark_services
 class ChathistoryTestCase(cases.BaseServerTestCase):
-    run_services = True
-
     @staticmethod
     def config() -> cases.TestCaseControllerConfig:
         return cases.TestCaseControllerConfig(chathistory=True)
diff --git a/irctest/server_tests/test_confusables.py b/irctest/server_tests/test_confusables.py
index bfe55c6..223d84b 100644
--- a/irctest/server_tests/test_confusables.py
+++ b/irctest/server_tests/test_confusables.py
@@ -2,9 +2,8 @@ from irctest import cases
 from irctest.numerics import ERR_NICKNAMEINUSE, RPL_WELCOME
 
 
+@cases.mark_services
 class ConfusablesTestCase(cases.BaseServerTestCase):
-    run_services = True
-
     @staticmethod
     def config() -> cases.TestCaseControllerConfig:
         return cases.TestCaseControllerConfig(
diff --git a/irctest/server_tests/test_extended_join.py b/irctest/server_tests/test_extended_join.py
index 69eea8a..7adf811 100644
--- a/irctest/server_tests/test_extended_join.py
+++ b/irctest/server_tests/test_extended_join.py
@@ -5,9 +5,8 @@
 from irctest import cases
 
 
+@cases.mark_services
 class MetadataTestCase(cases.BaseServerTestCase, cases.OptionalityHelper):
-    run_services = True
-
     def connectRegisteredClient(self, nick):
         self.addClient()
         self.sendLine(2, "CAP LS 302")
diff --git a/irctest/server_tests/test_sasl.py b/irctest/server_tests/test_sasl.py
index b4b37c3..9dee3e2 100644
--- a/irctest/server_tests/test_sasl.py
+++ b/irctest/server_tests/test_sasl.py
@@ -4,16 +4,14 @@ from irctest import cases
 from irctest.patma import ANYSTR
 
 
+@cases.mark_services
 class RegistrationTestCase(cases.BaseServerTestCase):
-    run_services = True
-
     def testRegistration(self):
         self.controller.registerUser(self, "testuser", "mypassword")
 
 
+@cases.mark_services
 class SaslTestCase(cases.BaseServerTestCase, cases.OptionalityHelper):
-    run_services = True
-
     @cases.mark_specifications("IRCv3")
     @cases.OptionalityHelper.skipUnlessHasMechanism("PLAIN")
     def testPlain(self):
diff --git a/irctest/server_tests/test_user_commands.py b/irctest/server_tests/test_user_commands.py
index abfd5a3..068c9c0 100644
--- a/irctest/server_tests/test_user_commands.py
+++ b/irctest/server_tests/test_user_commands.py
@@ -13,9 +13,8 @@ from irctest.numerics import (
 )
 
 
+@cases.mark_services
 class WhoisTestCase(cases.BaseServerTestCase, cases.OptionalityHelper):
-    run_services = True
-
     @cases.mark_specifications("RFC2812")
     def testWhoisUser(self):
         """Test basic WHOIS behavior"""
diff --git a/irctest/server_tests/test_znc_playback.py b/irctest/server_tests/test_znc_playback.py
index a742ecc..a5ac61f 100644
--- a/irctest/server_tests/test_znc_playback.py
+++ b/irctest/server_tests/test_znc_playback.py
@@ -13,9 +13,8 @@ def extract_playback_privmsgs(messages):
     return result
 
 
+@cases.mark_services
 class ZncPlaybackTestCase(cases.BaseServerTestCase):
-    run_services = True
-
     @staticmethod
     def config() -> cases.TestCaseControllerConfig:
         return cases.TestCaseControllerConfig(chathistory=True)
diff --git a/pytest.ini b/pytest.ini
index 35b2457..9eb742d 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -11,6 +11,7 @@ markers =
     # misc marks
     strict
     deprecated
+    services
 
     # capabilities
     account-tag