diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7648da177..e6cda73ef 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -94,7 +94,7 @@ jobs:
         run: pip install -e . -r requirements.txt
 
       - name: pytest
-        run: pytest --cov=pymodbus --cov=test --cov-report=term-missing --cov-report=xml -v --full-trace --timeout=20
+        run: pytest -n0 --cov=pymodbus --cov=test --cov-report=term-missing --cov-report=xml -v --full-trace --timeout=20
 
   analyze:
     name: Analyze Python
diff --git a/examples/simulator.py b/examples/simulator.py
index 9cd169806..820eaa415 100755
--- a/examples/simulator.py
+++ b/examples/simulator.py
@@ -42,7 +42,7 @@ async def run_calls(client, count):
     """Run client calls."""
     _logger.info("### Read fixed/increment/random value of different types.")
     _logger.info("--> UINT16")
-    for count in range(1, 100):
+    for count in range(1, 5):
         await read_registers(client, 1148, 1, True, curval=32117)
         await read_registers(client, 2305, 1, True, curval=50 + count)
         await read_registers(client, 2306, 1, True, minval=45, maxval=55)
@@ -62,8 +62,6 @@ async def run_simulator():
     """Run server."""
     _logger.info("### start server simulator")
     cmdline = [
-        "--log",
-        "debug",
         "--modbus_device",
         "device_try",
     ]