diff --git a/config_tempest/constants.py b/config_tempest/constants.py
index c6df515e..38a8203e 100644
--- a/config_tempest/constants.py
+++ b/config_tempest/constants.py
@@ -25,6 +25,7 @@ DEPLOYER_INPUT = os.path.join(os.path.expanduser("~"),
                               "tempest-deployer-input.conf")
 DEFAULT_IMAGE = ("https://download.cirros-cloud.net/0.4.0/"
                  "cirros-0.4.0-x86_64-disk.img")
+DEFAULT_IMAGE_DIR = 'etc'
 DEFAULT_IMAGE_FORMAT = 'qcow2'
 
 DEFAULT_FLAVOR_RAM = 128
diff --git a/config_tempest/main.py b/config_tempest/main.py
index 2f2ea09a..eb636bc6 100755
--- a/config_tempest/main.py
+++ b/config_tempest/main.py
@@ -89,9 +89,6 @@ def load_basic_defaults(conf):
             ("alt_password", "secrete"),
             ("alt_project_name", "alt_demo")
         ],
-        "scenario": [
-            ("img_dir", "etc")
-        ],
         "auth": [
             ("tempest_roles", "_member_"),
             ("admin_username", "admin"),
diff --git a/config_tempest/services/image.py b/config_tempest/services/image.py
index 020ecf42..72a1e09c 100644
--- a/config_tempest/services/image.py
+++ b/config_tempest/services/image.py
@@ -86,7 +86,16 @@ class ImageService(VersionedService):
 
         :type conf: TempestConf object
         """
-        img_dir = os.path.join(conf.get("scenario", "img_dir"))
+        # the absolute path is necessary for supporting older tempest versions,
+        # which had CONF.scenario.img_dir option, see this line of code:
+        # https://github.com/openstack/tempest/blob/a0ee8b4ccfc512a09
+        # e1ddb135950b767110aae9b/tempest/scenario/manager.py#L534
+        # If the path is not an absolute one, the concatenation of strings ^^
+        # will result in an invalid path
+        # Moreover the absolute path is needed so that users can move the
+        # generated tempest.conf outside of python-tempestconf destination,
+        # otherwise tempest would fail accessing the CONF.scenario.img_file
+        img_dir = os.path.abspath(os.path.join(C.DEFAULT_IMAGE_DIR))
         image_path = conf.get_defaulted('image', 'image_path')
         img_path = os.path.join(img_dir,
                                 os.path.basename(image_path))
@@ -112,8 +121,7 @@ class ImageService(VersionedService):
                                                  image_source=image_path,
                                                  image_dest=img_path)
         # get name of the image_id
-        image_id_name = self._find_image(image_id, '')['name']
-        conf.set('scenario', 'img_file', image_id_name)
+        conf.set('scenario', 'img_file', img_path)
         conf.set('compute', 'image_ref', image_id)
         conf.set('compute', 'image_ref_alt', alt_image_id)
 
diff --git a/config_tempest/tests/services/test_image.py b/config_tempest/tests/services/test_image.py
index 6ebf9837..e1f64683 100644
--- a/config_tempest/tests/services/test_image.py
+++ b/config_tempest/tests/services/test_image.py
@@ -17,6 +17,7 @@ from unittest import mock
 
 from fixtures import MonkeyPatch
 
+from config_tempest import constants as C
 from config_tempest.services.image import ImageService
 from config_tempest.tempest_conf import TempestConf
 from config_tempest.tests.base import BaseServiceTest
@@ -43,9 +44,8 @@ class TestImageService(BaseServiceTest):
         self.Service.convert = False
         self.Service.client = self.FakeServiceClient()
 
-        self.dir = "/img/"
+        C.DEFAULT_IMAGE_DIR = "/img/"
         self.conf = TempestConf()
-        self.conf.set("scenario", "img_dir", self.dir)
         self.conf.set("image", "image_path", "my_image.qcow2")
         self.conf.set("image", "http_image", "http_image.qcow2")
 
@@ -62,7 +62,7 @@ class TestImageService(BaseServiceTest):
         self.assertEqual(self.conf.get('compute', 'image_ref'), 'id_c')
         self.assertEqual(self.conf.get('compute', 'image_ref_alt'), 'id_d')
         self.assertEqual(self.conf.get('scenario', 'img_file'),
-                         'my_image.qcow2')
+                         '/img/my_image.qcow2')
 
     @mock.patch('config_tempest.services.image.ImageService._find_image')
     @mock.patch('config_tempest.services.image.ImageService._download_file')
diff --git a/doc/source/user/default.rst b/doc/source/user/default.rst
index 42bb7669..6f4c702e 100644
--- a/doc/source/user/default.rst
+++ b/doc/source/user/default.rst
@@ -16,16 +16,12 @@ Here is the list of tempest options, which are set by default:
     log_file = tempest.log
 
     [identity]
-    username = demo
+    username = demo_tempestconf
     password = secrete
     project_name = demo
-    alt_username = alt_demo
+    alt_username = alt_demo_tempestconf
     alt_password = secrete
     alt_project_name = alt_demo
-    disable_ssl_certificate_validation = true
-
-    [scenario]
-    img_dir = etc
 
     [auth]
     ; if _member_ role is not present in the system, python-tempestconf
diff --git a/releasenotes/notes/Remove-setting-of-scenario.img_dir-option-6d1792a9ab7928de.yaml b/releasenotes/notes/Remove-setting-of-scenario.img_dir-option-6d1792a9ab7928de.yaml
new file mode 100644
index 00000000..f28eeb60
--- /dev/null
+++ b/releasenotes/notes/Remove-setting-of-scenario.img_dir-option-6d1792a9ab7928de.yaml
@@ -0,0 +1,8 @@
+---
+upgrade:
+  - |
+    python-tempestconf follows tempest's deprecation of
+    ``CONF.scenario.img_dir`` option and removes that option from the
+    automatic tempest.conf generation.
+    python-tempestconf will set an absolute path to the image in
+    ``CONF.scenario.img_file`` option from now on.