diff --git a/Doc/library/imghdr.rst b/Doc/library/imghdr.rst
--- a/Doc/library/imghdr.rst
+++ b/Doc/library/imghdr.rst
@@ -50,6 +50,11 @@
 +------------+-----------------------------------+
 | ``'webp'`` | WebP files                        |
 +------------+-----------------------------------+
+| ``'exr'``  | OpenEXR Files                     |
++------------+-----------------------------------+
+
+.. versionadded:: 3.5
+   The *exr* format was added.
 
 .. versionchanged:: 3.5
    The *webp* type was added.
diff --git a/Lib/imghdr.py b/Lib/imghdr.py
--- a/Lib/imghdr.py
+++ b/Lib/imghdr.py
@@ -116,6 +116,12 @@
 
 tests.append(test_webp)
 
+def test_exr(h, f):
+    if h.startswith(b'\x76\x2f\x31\x01'):
+        return 'exr'
+
+tests.append(test_exr)
+
 #--------------------#
 # Small test program #
 #--------------------#
diff --git a/Lib/test/imghdrdata/python.exr b/Lib/test/imghdrdata/python.exr
new file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..773c81ee1fb850cdbb6cccd3ae5edabb80146481
GIT binary patch
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diff --git a/Lib/test/test_imghdr.py b/Lib/test/test_imghdr.py
--- a/Lib/test/test_imghdr.py
+++ b/Lib/test/test_imghdr.py
@@ -18,6 +18,7 @@
     ('python.tiff', 'tiff'),
     ('python.xbm', 'xbm'),
     ('python.webp', 'webp'),
+    ('python.exr', 'exr'),
 )
 
 class UnseekableIO(io.FileIO):