diff --git a/Makefile b/Makefile
index 8b45bdd..0ebe7ee 100644
--- a/Makefile
+++ b/Makefile
@@ -57,10 +57,10 @@ lint: ## reformat with black and check style with flake8
 	flake8 --ignore E231,W503,E402 sensospot_data tests
 
 test: ## run tests quickly with the default Python
-	pytest tests -x --disable-warnings
+	pytest tests -x --disable-warnings --random-order --failed-first
 
 coverage: ## full test suite, check code coverage and open coverage report
-	pytest tests --cov=sensospot_data
+	pytest tests --random-order --cov=sensospot_data
 	coverage html
 	$(BROWSER) htmlcov/index.html
 
diff --git a/pyproject.toml b/pyproject.toml
index 49abade..94cdcd0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,6 +35,7 @@ test = [
     "pytest >=4.0.0",
     "pytest-cov",
     "pytest-mock",
+    "pytest-random-order >=1.0.0",
     "tox",
 ]
 dev = [