diff -r 1469c4fde8cd Lib/imghdr.py
--- a/Lib/imghdr.py	Sat Jan 18 18:31:41 2014 +0200
+++ b/Lib/imghdr.py	Sat Jan 18 19:30:54 2014 +0100
@@ -112,6 +112,12 @@
 
 tests.append(test_bmp)
 
+def test_exr(h,f):
+    if h[0]==0x76 and h[1]==0x2f and h[2]==0x31 and h[3]==0x01:
+        return 'exr'
+
+tests.append(test_exr)
+
 #--------------------#
 # Small test program #
 #--------------------#