https://github.com/qunitjs/qunit/issues/1389

package.json

@@ -35,18 +35,18 @@
         "url": "https://github.com/ohze/rangy.git"
     },
     "scripts": {
-        "clean": "rimraf dist",
+        "postinstall": "echo 'https://github.com/qunitjs/qunit/issues/1389' && patch -i qunit.patch node_modules/qunit/qunit/qunit.js",
+        "clean": "rimraf dist .rpt2_cache",
         "tsc:scripts": "tsc -b scripts/tsconfig.json",
         "tsc:src": "node $NODE_DEBUG_OPTION scripts/tsc.js",
         "tsc:test": "tsc -b test/",
         "dist-prepare": "node scripts/dist-prepare.js",
         "rollup:src": "rollup -c scripts/rollup.config.js",
         "rollup:test": "rollup -c scripts/rollup.config.test.js",
-        "prebuild": "yarn run tsc:scripts",
         "build:src": "npm-run-all tsc:src rollup:src",
         "build:test": "npm-run-all --parallel tsc:test rollup:test",
-        "build": "npm-run-all --parallel build:*",
-        "prerelease": "npm-run-all clean tsc:scripts --parallel build:* dist-prepare",
+        "build": "run-s tsc:scripts build:src build:test",
+        "prerelease": "run-s clean build dist-prepare",
         "release": "node scripts/publish.js",
         "watch:src": "TODO FORCE_COLOR=1 rollup -c --watch",
         "watch": "TODO run-p -l watch:types watch:js",

qunit.patch

@@ -0,0 +1,11 @@
+--- node_modules/qunit/qunit/qunit.orig.js	2019-04-13 13:02:25.000000000 +0700
++++ node_modules/qunit/qunit/qunit.js	2019-04-20 12:10:07.000000000 +0700
+@@ -3996,7 +3996,7 @@
+   					expected = String(expected);
+
+   					// Expected is a constructor, maybe an Error constructor
+-  				} else if (expectedType === "function" && actual instanceof expected) {
++  				} else if (expectedType === "function" && expected.prototype !== undefined && actual instanceof expected) {
+   					result = true;
+
+   					// Expected is an Error object