chore: default to n_jobs = 1 for the CI

conftest.py

@@ -147,11 +147,14 @@ def default_configuration():
         enable_unsafe_features=True,
         use_insecure_key_cache=True,
         insecure_key_cache_location="ConcreteNumpyKeyCache",
+        fhe_simulation=False,  # Simulation compilation is done lazilly on circuit.simulate
+        fhe_execution=True,
     )
 
+
 @pytest.fixture
 def simulation_configuration():
-    """Return the default test compilation configuration for simulation."""
+    """Return the simulation test compilation configuration for simulation."""
 
     # Parameter `enable_unsafe_features` and `use_insecure_key_cache` are needed in order to be
     # able to cache generated keys through `insecure_key_cache_location`. As the name suggests,
@@ -165,6 +168,7 @@ def simulation_configuration():
         fhe_execution=False,
     )
 
+
 REMOVE_COLOR_CODES_RE = re.compile(r"\x1b[^m]*m")
 
 

src/concrete/ml/pytest/utils.py

@@ -388,6 +388,11 @@ def instantiate_model_generic(model_class, n_bits, **parameters):
         model_name (str): The type of the model as a string.
         model (object): The model instance.
     """
+    # Force multi threaded models to be single threaded as it's not working
+    # properly with pytest multi-threading
+    if "n_jobs" in model_class().get_params():
+        parameters["n_jobs"] = 1
+
     # If the model is a QNN, set the model using appropriate bit-widths
     if is_model_class_in_a_list(model_class, _get_sklearn_neural_net_models()):
         extra_kwargs = {}