diff --git a/.cirrus.yml b/.cirrus.yml
index ee40071..520b037 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -32,4 +32,19 @@ main_task:
     - ls
     - ./libfort_example
     - ./libfort_test_dev
-    - ./libfort_test
\ No newline at end of file
+    - ./libfort_test
+    - cd ..
+    - rm -r build/* 
+
+
+    # Test build without optimizations and with ubsan
+    - mkdir -p build
+    - cd build
+    - cmake .. -DFORT_BUILD_TYPE=ubsan  
+    - cmake --build . --target all 
+    - ls
+    - ./libfort_example
+    - ./libfort_test_dev
+    - ./libfort_test
+    - cd ..
+    - rm -r build/*