diff --git a/__tests__/math__test.js b/__tests__/math__test.js
deleted file mode 100644
index ec937914..00000000
--- a/__tests__/math__test.js
+++ /dev/null
@@ -1,5 +0,0 @@
-const foo = require('./mathtest')
-
-test('sdf', () => {
-    expect(1).toBe(2)
-})
\ No newline at end of file
diff --git a/__tests__/mathtest.js b/__tests__/mathtest.js
deleted file mode 100644
index 239d402e..00000000
--- a/__tests__/mathtest.js
+++ /dev/null
@@ -1,64 +0,0 @@
-// This example demonstrates importing a custom data type,
-// and extending an existing function (add) with support for this data type.
-
-const { create, factory, all } = require('mathjs');
-const math = create(all)
-
-// factory function which defines a new data type FunctionalDistribution
-const createFunctionalDistribution = factory('FunctionalDistribution', ['typed'], ({ typed }) => {
-  // create a new data type
-  function FunctionalDistribution (value) {
-    this.value = value
-  }
-  FunctionalDistribution.prototype.isFunctionalDistribution = true
-  FunctionalDistribution.prototype.toString = function () {
-    return 'FunctionalDistribution:' + this.value
-  }
-
-  // define a new data type with typed-function
-  typed.addType({
-    name: 'FunctionalDistribution',
-    test: function (x) {
-      // test whether x is of type FunctionalDistribution
-      return x && x.isFunctionalDistribution === true
-    }
-  })
-
-  return FunctionalDistribution
-})
-
-// function add which can add the FunctionalDistribution data type
-// When imported in math.js, the existing function `add` with support for
-// FunctionalDistribution, because both implementations are typed-functions and do not
-// have conflicting signatures.
-const createAddFunctionalDistribution = factory('add', ['typed', 'FunctionalDistribution'], ({ typed, FunctionalDistribution }) => {
-  return typed('add', {
-    'FunctionalDistribution, FunctionalDistribution': function (a, b) {
-      return new FunctionalDistribution(a.value + b.value)
-    }
-  })
-})
-
-const createSubtractFunctionalDistribution = factory('subtract', ['typed', 'FunctionalDistribution'], ({ typed, FunctionalDistribution }) => {
-  return typed('subtract', {
-    'FunctionalDistribution, FunctionalDistribution': function (a, b) {
-      return new FunctionalDistribution(a.value - b.value)
-    }
-  })
-})
-
-// import the new data type and function
-math.import([
-  createFunctionalDistribution,
-  createAddFunctionalDistribution,
-  createSubtractFunctionalDistribution
-])
-
-// use the new type
-const ans = math.chain(new math.FunctionalDistribution(2)).subtract(new math.FunctionalDistribution(3))
-// ans = FunctionalDistribution(5)
-
-console.log(ans.toString())
-// outputs 'FunctionalDistribution:5'
-
-module.exports = ans