diff --git a/src/bonsai/test/tool/test_project.py b/src/bonsai/test/tool/test_project.py
index ae0a187080..e9e11f4656 100644
--- a/src/bonsai/test/tool/test_project.py
+++ b/src/bonsai/test/tool/test_project.py
@@ -365,7 +365,7 @@ class TestLoadingIfcSqlite(NewFile):
             sql_type="SQLite",
         )
         patcher.patch()
-        tmp_file = Path(tempfile.mktemp(suffix=".ifcsqlite"))
+        tmp_file = Path(tempfile.mkstemp(suffix=".ifcsqlite")[1])
         ifcpatch.write(patcher.get_output(), tmp_file)
 
         elements_with_meshes = [
diff --git a/src/ifcpatch/test/test_ifcpatch.py b/src/ifcpatch/test/test_ifcpatch.py
index 4d7e98e55a..d0976965b6 100644
--- a/src/ifcpatch/test/test_ifcpatch.py
+++ b/src/ifcpatch/test/test_ifcpatch.py
@@ -52,10 +52,10 @@ class Test:
         assert output.by_type("IfcProject")[0].GlobalId == project.GlobalId
         assert output.by_type("IfcWall")[0].GlobalId == wall.GlobalId
 
-        output_path = Path(tempfile.mktemp())
+        output_path = Path(tempfile.mkstemp()[1])
         try:
-            assert not output_path.exists()
+            assert output_path.stat().st_size == 0
             ifcpatch.write(patcher.get_output(), output_path)
-            assert output_path.exists()
+            assert output_path.stat().st_size != 0
         finally:
             output_path.unlink()