diff --git a/tests/conftest.py b/tests/conftest.py
index 02589dc..15354f5 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,35 +1,4 @@
 import pytest
-import platform
-
-model_interface_dict = {}
-
-import pyoptinterface.gurobi as gurobi
-
-if gurobi.is_library_loaded():
-    model_interface_dict["gurobi"] = gurobi.Model
-
-import pyoptinterface.copt as copt
-
-if copt.is_library_loaded():
-    model_interface_dict["copt"] = copt.Model
-
-import pyoptinterface.mosek as mosek
-
-if mosek.is_library_loaded():
-    model_interface_dict["mosek"] = mosek.Model
-
-import pyoptinterface.highs as highs
-
-if highs.is_library_loaded():
-    model_interface_dict["highs"] = highs.Model
-
-
-@pytest.fixture(params=model_interface_dict.keys())
-def model_interface(request):
-    name = request.param
-    model_interface_class = model_interface_dict[name]
-    return model_interface_class()
-
 
 ipopt_model_dict = {}
 
@@ -44,11 +13,9 @@ def c():
         return ipopt.Model(jit="C")
 
     ipopt_model_dict["ipopt_llvm"] = llvm
-
-    if platform.system() != "Darwin":
-        # Skip the C JIT test on macOS, but it works correctly when run in the terminal
-        # needs further investigation
-        ipopt_model_dict["ipopt_c"] = c
+    # On macOS, loading dynamic library of Gurobi/COPT/Mosek before loading libtcc will cause memory error
+    # The reason is still unclear
+    ipopt_model_dict["ipopt_c"] = c
 
 
 @pytest.fixture(params=ipopt_model_dict.keys())
@@ -56,3 +23,24 @@ def ipopt_model_ctor(request):
     name = request.param
     ctor = ipopt_model_dict[name]
     return ctor
+
+
+model_interface_dict = {}
+
+from pyoptinterface import gurobi, copt, mosek, highs
+
+if gurobi.is_library_loaded():
+    model_interface_dict["gurobi"] = gurobi.Model
+if copt.is_library_loaded():
+    model_interface_dict["copt"] = copt.Model
+if mosek.is_library_loaded():
+    model_interface_dict["mosek"] = mosek.Model
+if highs.is_library_loaded():
+    model_interface_dict["highs"] = highs.Model
+
+
+@pytest.fixture(params=model_interface_dict.keys())
+def model_interface(request):
+    name = request.param
+    model_interface_class = model_interface_dict[name]
+    return model_interface_class()