karma-webpack-jasmine html-loader not working inside test

Question

I'm using karma-(webpack|typescript|jasmine|coverage) which is working neatly. The only problem is, that html-loader imports are undefined inside my tests. In other words, the following test is passed successfully:

// index.test.ts
import template from "../src/html/template.html";


describe("test", () => {

    it("template", () => {
        expect(template).toEqual(undefined);
    });

});

Config is looking like this:

// karma.config.js
module.exports = config => config.set({
    browsers: ["Chrome", "Firefox"],
    files: [
        {
            pattern: "src/**/*.+(js|ts)",
            watched: false,
        },
        {
            pattern: "test/**/*.test.+(js|ts)",
            watched: false,
        },
    ],
    frameworks: ["jasmine", "karma-typescript", "webpack"],
    karmaTypescriptConfig: {
        bundlerOptions: {
            transforms: [require("karma-typescript-es6-transform")()],
        },
        compilerOptions: {
            allowJs: true,
        },
    },
    preprocessors: {
        "src/**/*.+(js|ts)": ["webpack", "karma-typescript", "coverage"],
        "test/**/*.test.+(js|ts)": ["webpack", "karma-typescript"],
    },
    reporters: ["coverage", "kjhtml", "progress"],
    webpack: {
        module: {
            rules: [
                {
                    test: /\.css$/i,
                    use: ["style-loader", "css-loader"],
                },
                {
                    test: /\.html$/i,
                    use: ["html-loader"],
                },
            ],
        },
        resolve: {
            extensions: [".ts", "..."],
        },
        watch: false,
    },
});

Running only webpack with above config (+ entry, output etc.) is working fine, template = "<template></template>", which is the content of template.html.