diff --git a/Lib/test/test_imgfile.py b/Lib/test/test_imgfile.py
index 576a51c..aa9c414 100755
--- a/Lib/test/test_imgfile.py
+++ b/Lib/test/test_imgfile.py
@@ -24,12 +24,12 @@
     unlink('greytest.rgb')
 
 def findfile(file):
-	if os.path.isabs(file): return file
-	import sys
-	for dn in sys.path:
-		fn = os.path.join(dn, file)
-		if os.path.exists(fn): return fn
-	return file
+        if os.path.isabs(file): return file
+        import sys
+        for dn in sys.path:
+                fn = os.path.join(dn, file)
+                if os.path.exists(fn): return fn
+        return file
 
 def testimage(name):
     """Run through the imgfile's battery of possible methods
@@ -44,23 +44,23 @@
 
     # try opening the name directly
     try:
-	# This function returns a tuple (x, y, z) where x and y are the size
-	# of the image in pixels and z is the number of bytes per pixel. Only
-	# 3 byte RGB pixels and 1 byte greyscale pixels are supported.
-	sizes = imgfile.getsizes(name)
+        # This function returns a tuple (x, y, z) where x and y are the size
+        # of the image in pixels and z is the number of bytes per pixel. Only
+        # 3 byte RGB pixels and 1 byte greyscale pixels are supported.
+        sizes = imgfile.getsizes(name)
     except imgfile.error:
-	# get a more qualified path component of the script...
-	if __name__ == '__main__':
-	    ourname = sys.argv[0]
-	else: # ...or the full path of the module
-	    ourname = sys.modules[__name__].__file__
+        # get a more qualified path component of the script...
+        if __name__ == '__main__':
+            ourname = sys.argv[0]
+        else: # ...or the full path of the module
+            ourname = sys.modules[__name__].__file__
 
-	parts = string.splitfields(ourname, os.sep)
-	parts[-1] = name
-	name = string.joinfields(parts, os.sep)
-	sizes = imgfile.getsizes(name)
+        parts = string.splitfields(ourname, os.sep)
+        parts[-1] = name
+        name = string.joinfields(parts, os.sep)
+        sizes = imgfile.getsizes(name)
     if verbose:
-	print 'Opening test image: %s, sizes: %s' % (name, str(sizes))
+        print 'Opening test image: %s, sizes: %s' % (name, str(sizes))
     # This function reads and decodes the image on the specified file,
     # and returns it as a python string. The string has either 1 byte
     # greyscale pixels or 4 byte RGBA pixels. The bottom left pixel
@@ -74,12 +74,12 @@
     # are stored as 4 byte values of which only the lower three
     # bytes are used). These are the formats returned by gl.lrectread. 
     if verbose:
-	print 'Writing output file'
+        print 'Writing output file'
     imgfile.write (outputfile, image, sizes[0], sizes[1], sizes[2]) 
    
 
     if verbose:
-	print 'Opening scaled test image: %s, sizes: %s' % (name, str(sizes))
+        print 'Opening scaled test image: %s, sizes: %s' % (name, str(sizes))
     # This function is identical to read but it returns an image that
     # is scaled to the given x and y sizes. If the filter and blur
     # parameters are omitted scaling is done by simply dropping
@@ -93,7 +93,7 @@
     # makes no attempt to keep the aspect ratio correct, so that
     # is the users' responsibility.
     if verbose:
-	print 'Filtering with "impulse"'
+        print 'Filtering with "impulse"'
     simage = imgfile.readscaled (name, sizes[0]/2, sizes[1]/2, 'impulse', 2.0)
 
     # This function sets a global flag which defines whether the
@@ -101,14 +101,14 @@
     # top (flag is zero, compatible with SGI GL) or from top to
     # bottom(flag is one, compatible with X). The default is zero. 
     if verbose:
-	print 'Switching to X compatibility'
+        print 'Switching to X compatibility'
     imgfile.ttob (1) 
 
     if verbose:
-	print 'Filtering with "triangle"'
+        print 'Filtering with "triangle"'
     simage = imgfile.readscaled (name, sizes[0]/2, sizes[1]/2, 'triangle', 3.0)
     if verbose:
-	print 'Switching back to SGI compatibility'
+        print 'Switching back to SGI compatibility'
     imgfile.ttob (0) 
     
     if verbose: print 'Filtering with "quadratic"'
@@ -117,7 +117,7 @@
     simage = imgfile.readscaled (name, sizes[0]/2, sizes[1]/2, 'gaussian', 1.0)
 
     if verbose:
-	print 'Writing output file'
+        print 'Writing output file'
     imgfile.write (outputfile, simage, sizes[0]/2, sizes[1]/2, sizes[2]) 
 
     os.unlink(outputfile)