Fix.

node_modules/ts-jest/presets/index.js

@@ -0,0 +1,13 @@
+const create = require('./create')
+
+module.exports = {
+  get defaults() { return create() },
+  get jsWithTs() { return create({ allowJs: true }) },
+  get jsWithBabel() {
+    return create({ allowJs: false }, {
+      transform: {
+        '^.+\\.jsx?$': 'babel-jest',
+      },
+    })
+  },
+}