fix testing scripts (#1934)

Author: matthewbastien

package.json

@@ -2046,9 +2046,9 @@
     "check-package-json": "tsx ./scripts/check_package_json.ts",
     "test": "vscode-test && npm run grammar-test",
     "grammar-test": "vscode-tmgrammar-test test/unit-tests/**/*.test.swift.gyb -g test/unit-tests/syntaxes/swift.tmLanguage.json -g test/unit-tests/syntaxes/MagicPython.tmLanguage.json",
-    "integration-test": "npm test -- --label integrationTests",
-    "unit-test": "npm test -- --label unitTests",
-    "coverage": "npm test -- --coverage",
+    "integration-test": "npm run pretest && vscode-test --label integrationTests",
+    "unit-test": "npm run pretest && vscode-test --label unitTests",
+    "coverage": "npm run pretest && vscode-test --coverage",
     "compile-tests": "del-cli ./assets/test/**/.build && del-cli ./assets/test/**/.spm-cache && npm run compile",
     "package": "tsx ./scripts/package.ts",
     "dev-package": "tsx ./scripts/dev_package.ts",