diff -up patool-upstream-1.12/tests/archives/__init__.py.fix_zopfli_test patool-upstream-1.12/tests/archives/__init__.py
--- patool-upstream-1.12/tests/archives/__init__.py.fix_zopfli_test	2016-01-17 09:15:22.000000000 +0100
+++ patool-upstream-1.12/tests/archives/__init__.py	2018-02-07 16:19:39.295838917 +0100
@@ -182,6 +182,8 @@ class ArchiveTest (unittest.TestCase):
             program = 'cabextract'
         elif self.program == 'genisoimage':
             program = '7z'
+        elif self.program == 'zopfli':
+            program = 'gzip'
         elif self.program == 'shar':
             return
         command(archive, program=program)
@@ -204,6 +206,8 @@ class ArchiveTest (unittest.TestCase):
             program = 'unshar'
         elif self.program == 'genisoimage':
             program = '7z'
+        elif self.program == 'zopfli':
+            program = 'gzip'
         tmpdir = patoolib.util.tmpdir(dir=basedir)
         try:
             olddir = patoolib.util.chdir(tmpdir)
diff -up patool-upstream-1.12/tests/archives/test_zopfli.py.fix_zopfli_test patool-upstream-1.12/tests/archives/test_zopfli.py
--- patool-upstream-1.12/tests/archives/test_zopfli.py.fix_zopfli_test	2016-01-17 09:15:22.000000000 +0100
+++ patool-upstream-1.12/tests/archives/test_zopfli.py	2018-02-07 16:04:43.246057283 +0100
@@ -22,9 +22,4 @@ class TestZopfli(ArchiveTest):
 
     @needs_program(program)
     def test_zopfli(self):
-        self.archive_extract('t.txt.gz', check=Content.Singlefile)
-
-    @needs_program('file')
-    @needs_program(program)
-    def test_zopfli_file(self):
-        self.archive_extract('t.txt.gz.foo', check=Content.Singlefile)
+        self.archive_create('t.txt.gz', check=Content.Singlefile)