diff --git a/doc/configuration.rst b/doc/configuration.rst
index 03c21da5..2d7e324e 100644
--- a/doc/configuration.rst
+++ b/doc/configuration.rst
@@ -994,9 +994,6 @@ an OSTree repository. This always runs in Koji as a ``runroot`` task.
 
     * ``release`` -- (*str*) Release value to set for the installer image. Set
       to ``None`` to use the date.respin format.
-    * ``filename`` -- (*str*) What to name the installer iso. This is a
-      template with options listed in Image naming section. If not specified,
-      global naming format will be used.
 
     These optional keys are passed to ``lorax`` to customize the build.
 
@@ -1023,7 +1020,6 @@ Example config
             "x86_64": {
                 "source_repo_from": "Everything",
                 "release": None,
-                "filename": "%(release_short)s-%(variant)s-%(arch)s-%(version)s-%(date)s.iso",
                 "installpkgs": ["fedora-productimg-atomic"],
                 "add_template": ["atomic-installer/lorax-configure-repo.tmpl"],
                 "add_template_var": [
diff --git a/pungi/phases/ostree_installer.py b/pungi/phases/ostree_installer.py
index ad962174..95cf9c19 100644
--- a/pungi/phases/ostree_installer.py
+++ b/pungi/phases/ostree_installer.py
@@ -62,8 +62,7 @@ class OstreeInstallerThread(WorkerThread):
         self._run_ostree_cmd(compose, variant, arch, config, source_repo, output_dir)
 
         disc_type = compose.conf.get('disc_types', {}).get('dvd', 'dvd')
-        filename = compose.get_image_name(arch, variant, disc_type=disc_type,
-                                          format=config.get('filename'))
+        filename = compose.get_image_name(arch, variant, disc_type=disc_type)
         self._copy_image(compose, variant, arch, filename, output_dir)
         self._add_to_manifest(compose, variant, arch, filename)
         self.pool.log_info('[DONE ] %s' % msg)
diff --git a/tests/test_ostree_installer_phase.py b/tests/test_ostree_installer_phase.py
index 45643dad..6162904b 100644
--- a/tests/test_ostree_installer_phase.py
+++ b/tests/test_ostree_installer_phase.py
@@ -23,7 +23,6 @@ class OstreeInstallerPhaseTest(helpers.PungiTestCase):
                     "x86_64": {
                         "source_repo_from": "Everything",
                         "release": None,
-                        "filename": "%(release_short)s-%(variant)s-%(arch)s-%(version)s-%(date)s.iso",
                         "installpkgs": ["fedora-productimg-atomic"],
                         "add_template": ["/spin-kickstarts/atomic-installer/lorax-configure-repo.tmpl"],
                         "add_template_var": [
@@ -119,7 +118,6 @@ class OstreeThreadTest(helpers.PungiTestCase):
         cfg = {
             'source_repo_from': 'Everything',
             'release': '20160321.n.0',
-            'filename': 'Fedora-Atomic.iso',
         }
         koji = KojiWrapper.return_value
         koji.run_runroot_cmd.return_value = {
@@ -158,8 +156,7 @@ class OstreeThreadTest(helpers.PungiTestCase):
         self.assertEqual(get_mtime.call_args_list, [mock.call(final_iso_path)])
         self.assertImageAdded(compose, ImageCls, IsoWrapper)
         self.assertEqual(compose.get_image_name.call_args_list,
-                         [mock.call('x86_64', compose.variants['Everything'],
-                                    disc_type='dvd', format='Fedora-Atomic.iso')])
+                         [mock.call('x86_64', compose.variants['Everything'], disc_type='dvd')])
         self.assertTrue(os.path.isdir(self.topdir + '/work/x86_64/Everything/'))
         self.assertFalse(os.path.isdir(self.topdir + '/work/x86_64/Everything/ostree_installer'))
         self.assertEqual(run.call_args_list,
@@ -185,7 +182,6 @@ class OstreeThreadTest(helpers.PungiTestCase):
         cfg = {
             'source_repo_from': 'Everything',
             'release': '20160321.n.0',
-            'filename': 'Fedora-Atomic.iso',
             'add_template': ['some-file.txt'],
         }
         koji = KojiWrapper.return_value
@@ -225,7 +221,6 @@ class OstreeThreadTest(helpers.PungiTestCase):
         cfg = {
             'source_repo_from': 'Everything',
             'release': '20160321.n.0',
-            'filename': 'Fedora-Atomic.iso',
             'add_template': ['some_file.txt'],
             'add_arch_template': ['other_file.txt'],
             'template_repo': 'git://example.com/templates.git',
@@ -275,8 +270,7 @@ class OstreeThreadTest(helpers.PungiTestCase):
         self.assertEqual(get_mtime.call_args_list, [mock.call(final_iso_path)])
         self.assertImageAdded(compose, ImageCls, IsoWrapper)
         self.assertEqual(compose.get_image_name.call_args_list,
-                         [mock.call('x86_64', compose.variants['Everything'],
-                                    disc_type='dvd', format='Fedora-Atomic.iso')])
+                         [mock.call('x86_64', compose.variants['Everything'], disc_type='dvd')])
         self.assertTrue(os.path.isdir(self.topdir + '/work/x86_64/Everything/'))
         self.assertFalse(os.path.isdir(self.topdir + '/work/x86_64/Everything/ostree_installer'))
         self.assertEqual(run.call_args_list,
@@ -359,8 +353,7 @@ class OstreeThreadTest(helpers.PungiTestCase):
         self.assertEqual(get_mtime.call_args_list, [mock.call(final_iso_path)])
         self.assertImageAdded(compose, ImageCls, IsoWrapper)
         self.assertEqual(compose.get_image_name.call_args_list,
-                         [mock.call('x86_64', compose.variants['Everything'],
-                                    disc_type='dvd', format=None)])
+                         [mock.call('x86_64', compose.variants['Everything'], disc_type='dvd')])
 
     @mock.patch('kobo.shortcuts.run')
     @mock.patch('productmd.images.Image')
@@ -384,7 +377,6 @@ class OstreeThreadTest(helpers.PungiTestCase):
         cfg = {
             'source_repo_from': 'Everything',
             'release': None,
-            'filename': 'Fedora-Atomic.iso',
         }
         koji = KojiWrapper.return_value
         koji.run_runroot_cmd.side_effect = helpers.boom
@@ -419,7 +411,6 @@ class OstreeThreadTest(helpers.PungiTestCase):
         cfg = {
             'source_repo_from': 'Everything',
             'release': None,
-            'filename': 'Fedora-Atomic.iso',
         }
         koji = KojiWrapper.return_value
         koji.run_runroot_cmd.return_value = {