diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 382a20b0e48..276ff267e1a 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -62,6 +62,7 @@ jobs:
         run: |
           # To skip vault login in pull request checks
           export VAULT_SECRET_ID_FOR_DYNACONF=somesecret
+          export ROBOTTELO_SERVER__HOSTNAME=""
           pytest -sv tests/robottelo/
 
       - name: Make Docs
diff --git a/robottelo/config/validators.py b/robottelo/config/validators.py
index 8f6505db48d..9380cbb5267 100644
--- a/robottelo/config/validators.py
+++ b/robottelo/config/validators.py
@@ -10,7 +10,7 @@
         ),
     ],
     server=[
-        Validator('server.hostname', default=''),
+        Validator('server.hostname', is_type_of=str),
         Validator('server.hostnames', must_exist=True, is_type_of=list),
         Validator('server.version.release', must_exist=True),
         Validator('server.version.source', must_exist=True),