diff --git a/setup.cfg b/setup.cfg
index 613cd7e..664c24a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -61,7 +61,7 @@ ban-relative-imports = True
 inline-quotes = "
 
 [tool:pytest]
-addopts= --tb native -n4 -v -r fxX --maxfail=25 -p no:warnings
+addopts= --tb native -n1 -v -r fxX --maxfail=25 -p no:warnings
 python_files=tests/*test_*.py
 # python_functions=test_round_trip_same_named_column
 # log_level=DEBUG
diff --git a/tests/conftest.py b/tests/conftest.py
index ab4b9aa..6676d18 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -14,12 +14,13 @@
     from sqlalchemy import event, text
     from sqlalchemy import Engine
 
-
     @event.listens_for(Engine, "connect")
     def receive_engine_connect(conn, r):
         cur = conn.cursor()
         cur.execute('SET global format_null_as_str = 0')
         cur.execute('SET global enable_geo_create_table = 1')
+        try:
+            cur.execute("SET global sequence_step_size = 1")
+        except:
+            pass # don't fail when this setting doesn't exist
         cur.close()
-
-