diff --git a/Tests/test_imageshow.py b/Tests/test_imageshow.py
index 07e2100e8..14614b29e 100644
--- a/Tests/test_imageshow.py
+++ b/Tests/test_imageshow.py
@@ -73,12 +73,12 @@ def test_commandviewer():
         'start "Pillow" /WAIT "{file}" '             
         "&& ping -n 2 127.0.0.1 >NUL "
         '&& del /f "{file}"'
-	else:
-		# Not guessing command, just deleting
+    else:
+        # Not guessing command, just deleting
         basecmd = "rm -f {file}"
-	viewer = ImageShow.CommandViewer()
-	im = hopper()
-	assert viewer.show(im, command=basecmd) == 1
+    viewer = ImageShow.CommandViewer()
+    im = hopper()
+    assert viewer.show(im, command=basecmd) == 1
 
 def test_ipythonviewer():
     pytest.importorskip("IPython", reason="IPython not installed")