diff --git a/tests/test_sessions.py b/tests/test_sessions.py
index 1efd9a865..c5352ae93 100644
--- a/tests/test_sessions.py
+++ b/tests/test_sessions.py
@@ -177,27 +177,6 @@ def test_session_do_not_reuse_id(pub, user, app):
     assert pub.session_manager.session_class.count() == 2
 
 
-def test_session_substitution_variables(pub, user, app):
-    pub.session_manager.session_class.wipe()
-    resp = app.get('/')
-
-    formdef = FormDef()
-    formdef.name = 'foobar'
-    formdef.fields = [fields.CommentField(id='7', label='Hello [session_id]', type='comment')]
-    formdef.store()
-
-    resp = app.get('/foobar/')
-    assert pub.session_manager.session_class.count() == 1
-    session_id = pub.session_manager.session_class.select()[0].id
-    assert 'Hello %s' % session_id in resp.text
-
-    login(app, username='foo', password='foo')
-    assert pub.session_manager.session_class.count() == 2
-    session_id = [x for x in pub.session_manager.session_class.select() if x.id != session_id][0].id
-    resp = app.get('/foobar/')
-    assert 'Hello %s' % session_id in resp.text
-
-
 def test_session_substitution_variables_1st_page_condition(pub, user, app):
     pub.session_manager.session_class.wipe()
     resp = app.get('/')
@@ -205,17 +184,15 @@ def test_session_substitution_variables_1st_page_condition(pub, user, app):
     formdef = FormDef()
     formdef.name = 'foobar'
     formdef.fields = [fields.PageField(id='0', label='1st PAGE', type='page',
-            condition={'type': 'python', 'value': 'vars().get("session_id") is not None'}),
-            fields.CommentField(id='7', label='COM1 [session_id]', type='comment'),
+            condition={'type': 'python', 'value': 'vars().get("session_hash_id") is not None'}),
             fields.CommentField(id='10', label='COMHASH1 [session_hash_id]', type='comment'),
             fields.PageField(id='8', label='2nd PAGE', type='page'),
-            fields.CommentField(id='9', label='COM2 [session_id]', type='comment')]
+            fields.CommentField(id='9', label='COM2 [session_hash_id]', type='comment')]
     formdef.store()
 
     resp = app.get('/foobar/')
     assert pub.session_manager.session_class.count() == 1
     session = pub.session_manager.session_class.select()[0]
-    assert 'COM1 %s' % session.id in resp.text
     assert 'COMHASH1 %s' % session.get_substitution_variables().get('session_hash_id') in resp.text
 
 
diff --git a/wcs/forms/root.py b/wcs/forms/root.py
index b7295b1df..af9bc4672 100644
--- a/wcs/forms/root.py
+++ b/wcs/forms/root.py
@@ -635,7 +635,7 @@ class FormPage(Directory, FormTemplateMixin):
         session = get_session()
         if not session.id:
             # force session to be written down, this is required so
-            # [session_var_id] is available on the first page.
+            # [session_hash_id] is available on the first page.
             session.force()
 
         if self.has_draft_support():
diff --git a/wcs/qommon/sessions.py b/wcs/qommon/sessions.py
index d194393ba..c75abbdc9 100644
--- a/wcs/qommon/sessions.py
+++ b/wcs/qommon/sessions.py
@@ -335,7 +335,6 @@ class Session(QommonSession, CaptchaSession, StorableObject):
 
     def get_substitution_variables(self, prefix='session_'):
         d = {}
-        d[prefix + 'id'] = self.id
         d[prefix + 'hash_id'] = hashlib.sha1(force_bytes(self.id)).hexdigest()
         if self.extra_variables:
             for k, v in self.extra_variables.items():