diff --git a/build.py b/build.py
index 4ad0d7d..9bb4b78 100644
--- a/build.py
+++ b/build.py
@@ -95,19 +95,19 @@ def initialize(project):
 
 @task
 def test(project):
-    run("pytest")
+    run("pytest", check=True)
 
 @task
 def lint(project):
     run("flake8 --max-line-length=120 --count --select=E9,F63,F7,F82 "+
-        "--show-source --statistics src/main/python/ddadevops/", shell=True)
+        "--show-source --statistics src/main/python/ddadevops/", shell=True, check=True)
     run("flake8 --count --exit-zero --max-complexity=10 --max-line-length=127 "+
     "--per-file-ignores=\"__init__.py:F401\" "+
-    "--ignore=E722,W503 --statistics src/main/python/ddadevops/", shell=True)
+    "--ignore=E722,W503 --statistics src/main/python/ddadevops/", shell=True, check=True)
     run("python -m mypy src/main/python/ddadevops/ --ignore-missing-imports "+
-    "--disable-error-code=attr-defined --disable-error-code=union-attr", shell=True)
+    "--disable-error-code=attr-defined --disable-error-code=union-attr", shell=True, check=True)
     run("pylint -d W0511,R0903,C0301,W0614,C0114,C0115,C0116,similarities,W1203,W0702,W0702,"+
-    "R0913,R0902,R0914,R1732,R1705,W0707,C0123,W0703,C0103 src/main/python/ddadevops/", shell=True)
+    "R0913,R0902,R0914,R1732,R1705,W0707,C0123,W0703,C0103 src/main/python/ddadevops/", shell=True, check=True)
 
 @task
 def patch(project):