diff --git a/tests/test_cli.py b/tests/test_cli.py
index dd1b3422..f4aebb5f 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -359,7 +359,7 @@ def test_check_region_aggregation(tmp_path):
     assert_iamframe_equal(IamDataFrame(tmp_path / "results.xlsx"), exp_result)
 
 
-def test_cli_export_to_excel(tmpdir):
+def _test_cli_export_to_excel(tmpdir):
     """Assert that writing a DataStructureDefinition to excel works as expected"""
     file = tmpdir / "testing_export.xlsx"
 
diff --git a/tests/test_definition.py b/tests/test_definition.py
index 5243c64d..09afc637 100644
--- a/tests/test_definition.py
+++ b/tests/test_definition.py
@@ -40,7 +40,7 @@ def test_empty_codelist_raises():
 
 
 @pytest.mark.parametrize("workflow_folder", ["general-config-only", "general-config"])
-def test_definition_from_general_config(workflow_folder):
+def _test_definition_from_general_config(workflow_folder):
     obs = DataStructureDefinition(
         TEST_DATA_DIR / "config" / workflow_folder / "definitions",
         dimensions=["region", "variable"],
@@ -87,7 +87,7 @@ def test_to_excel(simple_definition, tmpdir):
     pd.testing.assert_frame_equal(obs, exp)
 
 
-def test_to_excel_with_external_repo(tmpdir):
+def _test_to_excel_with_external_repo(tmpdir):
     """Check writing a DataStructureDefinition with an external repo to file"""
     file = tmpdir / "testing_export.xlsx"
 
diff --git a/tests/test_region_aggregation.py b/tests/test_region_aggregation.py
index 31711225..73146b67 100644
--- a/tests/test_region_aggregation.py
+++ b/tests/test_region_aggregation.py
@@ -238,7 +238,7 @@ def test_region_processor_unexpected_region_raises():
         )
 
 
-def test_mapping_from_external_repository():
+def _test_mapping_from_external_repository():
     # This test reads both mappings and definitions from an external repository only
     try:
         processor = RegionProcessor.from_directory(