diff --git a/Makefile b/Makefile
index 43f7b46..d24c058 100644
--- a/Makefile
+++ b/Makefile
@@ -1,15 +1,19 @@
-tester = vendor/bin/tester
+src_dir = src/
+tester_bin = vendor/bin/tester
 tests_dir = tests/
 coverage_name = $(tests_dir)coverage.html
-php_ini = $(tests_dir)php-unix.ini
 php_bin = php
+phpstan_bin = phpstan
 
-.PHONY: test coverage clean
+.PHONY: test coverage clean phpstan
 test:
-		@$(tester) -p $(php_bin) -c $(php_ini) $(tests_dir)
+		@$(tester_bin) -p $(php_bin) -C $(tests_dir)
 
 coverage:
-		@$(tester) -p $(php_bin) -c $(php_ini) --coverage $(coverage_name) --coverage-src src/ $(tests_dir)
+		@$(tester_bin) -p $(php_bin) -C -d zend_extension=xdebug --coverage $(coverage_name) --coverage-src $(src_dir) $(tests_dir)
 
 clean:
 		@rm -f $(coverage_name)
+
+phpstan:
+		@$(phpstan_bin)
diff --git a/tests/php-unix.ini b/tests/php-unix.ini
deleted file mode 100644
index 7575ed0..0000000
--- a/tests/php-unix.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[Zend]
-zend_extension=xdebug.so