diff --git a/tests/test_convert_grid_format.py b/tests/test_convert_grid_format.py
index aeaafd1de..ba0f6c762 100644
--- a/tests/test_convert_grid_format.py
+++ b/tests/test_convert_grid_format.py
@@ -24,7 +24,7 @@
 def test_convert_grid_format_egrid(tmpdir):
     """Convert an ECLIPSE egrid to roff"""
 
-    outfile = os.path.join(tmpdir, "reek_grid.roff")
+    outfile = os.path.join(str(tmpdir), "reek_grid.roff")
 
     cgf.main(["--file", RFILE1, "--output", outfile, "--mode", "grid", "--standardfmu"])
 
@@ -32,13 +32,11 @@ def test_convert_grid_format_egrid(tmpdir):
     gg = xtgeo.Grid(outfile)
     assert gg.nactive == 35817
 
-    shutil.rmtree(tmpdir)
-
 
 def test_convert_grid_format_restart(tmpdir):
     """Convert an ECLIPSE SOIL from restart to roff"""
 
-    outfile = os.path.join(tmpdir, "reek_grid.roff")
+    outfile = os.path.join(str(tmpdir), "reek_grid.roff")
 
     cgf.main(
         [
@@ -56,10 +54,8 @@ def test_convert_grid_format_restart(tmpdir):
         ]
     )
 
-    actual_outfile = os.path.join(tmpdir, "reek_grid--soil--20000701.roff")
+    actual_outfile = os.path.join(str(tmpdir), "reek_grid--soil--20000701.roff")
 
     gprop = xtgeo.GridProperty(actual_outfile)
 
     assert gprop.values.mean() == pytest.approx(0.0857, abs=0.001)
-
-    shutil.rmtree(tmpdir)