diff --git a/python/tests/test_sbml_import.py b/python/tests/test_sbml_import.py
index b09257d3a1..424deef89a 100644
--- a/python/tests/test_sbml_import.py
+++ b/python/tests/test_sbml_import.py
@@ -22,7 +22,6 @@
 )
 
 
-@pytest.fixture
 def simple_sbml_model():
     """Some testmodel"""
     document = libsbml.SBMLDocument(3, 1)
@@ -45,9 +44,9 @@ def simple_sbml_model():
     return document, model
 
 
-def test_sbml2amici_no_observables(simple_sbml_model):
+def test_sbml2amici_no_observables():
     """Test model generation works for model without observables"""
-    sbml_doc, sbml_model = simple_sbml_model
+    sbml_doc, sbml_model = simple_sbml_model()
     sbml_importer = SbmlImporter(sbml_source=sbml_model, from_file=False)
     model_name = "test_sbml2amici_no_observables"
     with TemporaryDirectory() as tmpdir:
@@ -64,9 +63,9 @@ def test_sbml2amici_no_observables(simple_sbml_model):
 
 
 @skip_on_valgrind
-def test_sbml2amici_nested_observables_fail(simple_sbml_model):
+def test_sbml2amici_nested_observables_fail():
     """Test model generation works for model without observables"""
-    sbml_doc, sbml_model = simple_sbml_model
+    sbml_doc, sbml_model = simple_sbml_model()
     sbml_importer = SbmlImporter(sbml_source=sbml_model, from_file=False)
     model_name = "test_sbml2amici_nested_observables_fail"
     with TemporaryDirectory() as tmpdir:
@@ -84,8 +83,8 @@ def test_sbml2amici_nested_observables_fail(simple_sbml_model):
             )
 
 
-def test_nosensi(simple_sbml_model):
-    sbml_doc, sbml_model = simple_sbml_model
+def test_nosensi():
+    sbml_doc, sbml_model = simple_sbml_model()
     sbml_importer = SbmlImporter(sbml_source=sbml_model, from_file=False)
     model_name = "test_nosensi"
     with TemporaryDirectory() as tmpdir:
@@ -111,8 +110,8 @@ def test_nosensi(simple_sbml_model):
 
 
 @pytest.fixture(scope="session")
-def observable_dependent_error_model(simple_sbml_model):
-    sbml_doc, sbml_model = simple_sbml_model
+def observable_dependent_error_model():
+    sbml_doc, sbml_model = simple_sbml_model()
     # add parameter and rate rule
     sbml_model.getSpecies("S1").setInitialConcentration(1.0)
     sbml_model.getParameter("p1").setValue(0.2)
@@ -695,9 +694,9 @@ def test_code_gen_uses_lhs_symbol_ids():
 
 
 @skip_on_valgrind
-def test_hardcode_parameters(simple_sbml_model):
+def test_hardcode_parameters():
     """Test model generation works for model without observables"""
-    sbml_doc, sbml_model = simple_sbml_model
+    sbml_doc, sbml_model = simple_sbml_model()
     sbml_importer = SbmlImporter(sbml_source=sbml_model, from_file=False)
     r = sbml_model.createRateRule()
     r.setVariable("S1")