fixed regex error

Author: debeshmandal

test/test_readers/test_readers.py

@@ -13,7 +13,7 @@
 # needed for windows CI
 if environ.get('CI', False):
     if re.findall(r"win[0-9][0-9]", sys.platform):
-        if not re.findall('test[/|\\]test_readers', ROOT):
+        if not re.findall('test_readers', ROOT):
             ROOT = 'test/test_readers'
 
 def test_Reader():