diff --git a/Makefile.frag.w32 b/Makefile.frag.w32
index 548ea4d..6900c60 100644
--- a/Makefile.frag.w32
+++ b/Makefile.frag.w32
@@ -29,7 +29,11 @@ $(AWSCRT_DIR)\src\api.h: $(AWSCRT_DIR)\crt\aws-crt-ffi\src\api.h
 $(AWSCRT_DIR)\ext\api.h : $(AWSCRT_DIR)\src\api.h
 	copy $(AWSCRT_DIR)\src\api.h $(AWSCRT_DIR)\ext\api.h
 
-# Use PHPUnit to run tests
+# Use PHPUnit and composer to run tests
 test-awscrt: install $(AWSCRT_DIR)\src\api.h $(BUILD_DIR)\php_awscrt.dll
-	$(PHP_BINARY) -c $(AWSCRT_DIR)\php-win.ini $(COMPOSER_PHAR) --working-dir=$(AWSCRT_DIR) update
-	$(PHP_BINARY) -c $(AWSCRT_DIR)\php-win.ini $(COMPOSER_PHAR) --working-dir=$(AWSCRT_DIR) run test-win
+	curl -o composer-setup.php https://getcomposer.org/installer
+    php .\composer-setup.php
+	php --version
+	$(PHP_BINARY) --version
+	$(PHP_BINARY) -c $(AWSCRT_DIR)\php-win.ini .\composer.phar --working-dir=$(AWSCRT_DIR) update
+	$(PHP_BINARY) -c $(AWSCRT_DIR)\php-win.ini .\composer.phar --working-dir=$(AWSCRT_DIR) run test-win
\ No newline at end of file