diff --git a/tests/storage/dav/test_caldav.py b/tests/storage/dav/test_caldav.py
index 37c7576..b0b8859 100644
--- a/tests/storage/dav/test_caldav.py
+++ b/tests/storage/dav/test_caldav.py
@@ -40,7 +40,7 @@ class TestCalDAVStorage(DAVStorageTests):
     # The `arg` param is not named `item_types` because that would hit
     # https://bitbucket.org/pytest-dev/pytest/issue/745/
     @pytest.mark.parametrize(
-        "arg,calls_num",
+        ("arg", "calls_num"),
         [
             (("VTODO",), 1),
             (("VEVENT",), 1),
diff --git a/tests/system/cli/test_discover.py b/tests/system/cli/test_discover.py
index 1bb9f71..f8d5580 100644
--- a/tests/system/cli/test_discover.py
+++ b/tests/system/cli/test_discover.py
@@ -191,7 +191,7 @@ def test_null_collection_with_named_collection(tmpdir, runner):
 
 
 @pytest.mark.parametrize(
-    "a_requires,b_requires",
+    ("a_requires", "b_requires"),
     [
         (True, True),
         (True, False),
diff --git a/tests/system/cli/test_sync.py b/tests/system/cli/test_sync.py
index 78b1362..88c656b 100644
--- a/tests/system/cli/test_sync.py
+++ b/tests/system/cli/test_sync.py
@@ -358,7 +358,7 @@ def test_ident_conflict(tmpdir, runner):
 
 
 @pytest.mark.parametrize(
-    "existing,missing",
+    ("existing", "missing"),
     [
         ("foo", "bar"),
         ("bar", "foo"),
@@ -402,7 +402,7 @@ def test_no_configured_pairs(tmpdir, runner, cmd):
 
 
 @pytest.mark.parametrize(
-    "resolution,expect_foo,expect_bar",
+    ("resolution", "expect_foo", "expect_bar"),
     [(["command", "cp"], "UID:lol\nfööcontent", "UID:lol\nfööcontent")],
 )
 def test_conflict_resolution(tmpdir, runner, resolution, expect_foo, expect_bar):
diff --git a/tests/unit/cli/test_discover.py b/tests/unit/cli/test_discover.py
index fef646e..a396482 100644
--- a/tests/unit/cli/test_discover.py
+++ b/tests/unit/cli/test_discover.py
@@ -9,7 +9,7 @@ missing = object()
 
 
 @pytest.mark.parametrize(
-    "shortcuts,expected",
+    ("shortcuts", "expected"),
     [
         (
             ["from a"],
diff --git a/tests/unit/sync/test_sync.py b/tests/unit/sync/test_sync.py
index 261780d..c6c3101 100644
--- a/tests/unit/sync/test_sync.py
+++ b/tests/unit/sync/test_sync.py
@@ -437,7 +437,7 @@ async def test_partial_sync_revert():
     assert items(a) == {"UID:2"}
 
 
-@pytest.mark.parametrize("sync_inbetween", (True, False))
+@pytest.mark.parametrize("sync_inbetween", [True, False])
 @pytest.mark.asyncio
 async def test_ident_conflict(sync_inbetween):
     a = MemoryStorage()
diff --git a/tests/unit/test_repair.py b/tests/unit/test_repair.py
index 9d1e61e..8f059ff 100644
--- a/tests/unit/test_repair.py
+++ b/tests/unit/test_repair.py
@@ -58,7 +58,7 @@ async def test_repair_unsafe_uids(uid):
 
 
 @pytest.mark.parametrize(
-    "uid,href", [("b@dh0mbr3", "perfectly-fine"), ("perfectly-fine", "b@dh0mbr3")]
+    ("uid", "href"), [("b@dh0mbr3", "perfectly-fine"), ("perfectly-fine", "b@dh0mbr3")]
 )
 def test_repair_unsafe_href(uid, href):
     item = Item(f"BEGIN:VCARD\nUID:{uid}\nEND:VCARD")