diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cf12f3c56d5b1cc0f7181302fea3cd461f2a3400..97e147784582ac961583ab735884b9348f5ad20f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -300,21 +300,21 @@ test:2.7:
   <<: *test_template
   <<: *install_python
   variables:
-    - PYTHON_VERSION: "python2.7"
+    PYTHON_VERSION: "python2.7"
 
 
 test:3.5:
   <<: *test_template
   <<: *install_python
   variables:
-    - PYTHON_VERSION: "python3.5"
+    PYTHON_VERSION: "python3.5"
 
 
 test:3.6:
   <<: *test_template
   <<: *install_python
   variables:
-    - PYTHON_VERSION: "python3.6"
+    PYTHON_VERSION: "python3.6"
 
 
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