diff --git a/tests/conftest.py b/tests/conftest.py
index 5a65cb7..3797ee2 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -38,7 +38,11 @@ def pytest_generate_tests(metafunc):
     if "pgmq_all_variants" in metafunc.fixturenames:
         driver_from_cli = metafunc.config.getoption("--driver")
         
-        # Define sync and async fixture variants
+        # Define sync fixture variants
+        # pgmq_all_variants is only for sync drivers because the dependent fixtures
+        # (pgmq_setup_teardown, pgmq_partitioned_setup_teardown) call methods like
+        # create_queue() and drop_queue() directly without await, which would fail
+        # with async PGMQ instances
         sync_fixtures = [
             'pgmq_by_dsn',
             'pgmq_by_engine',
@@ -47,29 +51,25 @@ def pytest_generate_tests(metafunc):
             'pgmq_by_dsn_and_session_maker',
         ]
         
-        async_fixtures = [
-            'pgmq_by_async_dsn',
-            'pgmq_by_async_engine',
-            'pgmq_by_async_session_maker',
-        ]
-        
         # Determine which fixtures to use
         if not driver_from_cli:
-            # No driver specified, use all fixtures
-            fixture_params = sync_fixtures + async_fixtures
+            # No driver specified, use only sync fixtures
+            fixture_params = sync_fixtures
         elif driver_from_cli in ASYNC_DRIVERS:
-            # Async driver specified
-            fixture_params = async_fixtures
+            # Async driver specified, skip tests using pgmq_all_variants
+            # (empty fixture list will cause pytest to skip these tests)
+            fixture_params = []
         else:
             # Sync driver specified
             fixture_params = sync_fixtures
         
-        # Parametrize the test
-        metafunc.parametrize(
-            "pgmq_all_variants",
-            fixture_params,
-            indirect=True
-        )
+        # Only parametrize if there are fixtures to use
+        if fixture_params:
+            metafunc.parametrize(
+                "pgmq_all_variants",
+                fixture_params,
+                indirect=True
+            )
 
 
 @pytest.fixture(scope="module")
diff --git a/tests/fixture_deps.py b/tests/fixture_deps.py
index b1bc6e8..88fe527 100644
--- a/tests/fixture_deps.py
+++ b/tests/fixture_deps.py
@@ -12,17 +12,21 @@
 @pytest.fixture(scope="function")
 def pgmq_all_variants(request: pytest.FixtureRequest) -> PGMQueue:
     """
-    Fixture that parametrizes tests across all appropriate PGMQueue initialization methods.
+    Fixture that parametrizes tests across all appropriate PGMQueue sync initialization methods.
     
-    When --driver is specified, only fixtures matching that driver type (sync/async) are used.
-    Without --driver, all fixtures are used.
+    Note: This fixture only provides sync driver variants. Async driver tests should use
+    async fixtures directly (pgmq_by_async_dsn, pgmq_by_async_engine, pgmq_by_async_session_maker).
+    
+    When --driver is specified as a sync driver, only fixtures matching that driver are used.
+    When --driver is specified as an async driver, tests using this fixture are skipped.
+    Without --driver, only sync fixtures are used.
     
     The parametrization is handled by pytest_generate_tests in conftest.py.
     
     Usage:
         def test_something(pgmq_all_variants):
             pgmq: PGMQueue = pgmq_all_variants
-            # test code here
+            # test code here (sync methods only)
     """
     # The param is set by pytest_generate_tests via indirect parametrization
     return request.getfixturevalue(request.param)