diff --git a/test/server/Server.test.js b/test/server/Server.test.js
deleted file mode 100644
index 225e45b7d8..0000000000
--- a/test/server/Server.test.js
+++ /dev/null
@@ -1,107 +0,0 @@
-"use strict";
-
-const { relative, sep } = require("path");
-const webpack = require("webpack");
-const Server = require("../../lib/Server");
-const config = require("../fixtures/simple-config/webpack.config");
-const port = require("../ports-map").server;
-const isWebpack5 = require("../helpers/isWebpack5");
-
-const baseDevConfig = {
-  port,
-  host: "localhost",
-  static: false,
-};
-
-describe("Server", () => {
-  describe("DevServerPlugin", () => {
-    let entries;
-
-    function getEntries(server) {
-      if (isWebpack5) {
-        server.middleware.context.compiler.hooks.afterEmit.tap(
-          "webpack-dev-server",
-          (compilation) => {
-            const mainDeps = compilation.entries.get("main").dependencies;
-            const globalDeps = compilation.globalEntry.dependencies;
-
-            entries = globalDeps
-              .concat(mainDeps)
-              .map((dep) => relative(".", dep.request).split(sep));
-          }
-        );
-      } else {
-        entries = server.middleware.context.compiler.options.entry.map((p) =>
-          relative(".", p).split(sep)
-        );
-      }
-    }
-
-    it("add hot option", (done) => {
-      const compiler = webpack(config);
-      const server = new Server({ ...baseDevConfig, hot: true }, compiler);
-
-      compiler.hooks.done.tap("webpack-dev-server", () => {
-        expect(entries).toMatchSnapshot();
-
-        server.stopCallback(done);
-      });
-
-      server.startCallback((error) => {
-        if (error) {
-          throw error;
-        }
-
-        getEntries(server);
-      });
-    });
-
-    it("add hot-only option", (done) => {
-      const compiler = webpack(config);
-      const server = new Server({ ...baseDevConfig, hot: "only" }, compiler);
-
-      compiler.hooks.done.tap("webpack-dev-server", () => {
-        expect(entries).toMatchSnapshot();
-
-        server.stopCallback(done);
-      });
-
-      server.startCallback((error) => {
-        if (error) {
-          throw error;
-        }
-
-        getEntries(server);
-      });
-    });
-
-    // TODO: remove this after plugin support is published
-    it("should create and run server with old parameters order and log deprecation warning", (done) => {
-      const compiler = webpack(config);
-      const util = require("util");
-      const utilSpy = jest.spyOn(util, "deprecate");
-
-      const server = new Server(compiler, baseDevConfig);
-
-      expect(utilSpy.mock.calls[0][1]).toBe(
-        "Using 'compiler' as the first argument is deprecated. Please use 'options' as the first argument and 'compiler' as the second argument."
-      );
-
-      compiler.hooks.done.tap("webpack-dev-server", () => {
-        expect(entries).toMatchSnapshot("oldparam");
-
-        server.stopCallback(done);
-      });
-
-      server.startCallback((error) => {
-        if (error) {
-          throw error;
-        }
-
-        getEntries(server);
-      });
-
-      utilSpy.mockRestore();
-    });
-  });
-});
diff --git a/test/server/__snapshots__/Server.test.js.snap.webpack4 b/test/server/__snapshots__/Server.test.js.snap.webpack4
deleted file mode 100644
index 91db318c1d..0000000000
--- a/test/server/__snapshots__/Server.test.js.snap.webpack4
+++ /dev/null
@@ -1,55 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`Server DevServerPlugin add hot option 1`] = `
-Array [
-  Array [
-    "client",
-    "index.js?protocol=ws%3A&hostname=localhost&port=8124&pathname=%2Fws&logging=info&reconnect=10",
-  ],
-  Array [
-    "node_modules",
-    "webpack",
-    "hot",
-    "dev-server.js",
-  ],
-  Array [
-    "foo.js",
-  ],
-]
-`;
-
-exports[`Server DevServerPlugin add hot-only option 1`] = `
-Array [
-  Array [
-    "client",
-    "index.js?protocol=ws%3A&hostname=localhost&port=8124&pathname=%2Fws&logging=info&reconnect=10",
-  ],
-  Array [
-    "node_modules",
-    "webpack",
-    "hot",
-    "only-dev-server.js",
-  ],
-  Array [
-    "foo.js",
-  ],
-]
-`;
-
-exports[`Server DevServerPlugin should create and run server with old parameters order and log deprecation warning: oldparam 1`] = `
-Array [
-  Array [
-    "client",
-    "index.js?protocol=ws%3A&hostname=localhost&port=8124&pathname=%2Fws&logging=info&reconnect=10",
-  ],
-  Array [
-    "node_modules",
-    "webpack",
-    "hot",
-    "dev-server.js",
-  ],
-  Array [
-    "foo.js",
-  ],
-]
-`;
diff --git a/test/server/__snapshots__/Server.test.js.snap.webpack5 b/test/server/__snapshots__/Server.test.js.snap.webpack5
deleted file mode 100644
index 91db318c1d..0000000000
--- a/test/server/__snapshots__/Server.test.js.snap.webpack5
+++ /dev/null
@@ -1,55 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`Server DevServerPlugin add hot option 1`] = `
-Array [
-  Array [
-    "client",
-    "index.js?protocol=ws%3A&hostname=localhost&port=8124&pathname=%2Fws&logging=info&reconnect=10",
-  ],
-  Array [
-    "node_modules",
-    "webpack",
-    "hot",
-    "dev-server.js",
-  ],
-  Array [
-    "foo.js",
-  ],
-]
-`;
-
-exports[`Server DevServerPlugin add hot-only option 1`] = `
-Array [
-  Array [
-    "client",
-    "index.js?protocol=ws%3A&hostname=localhost&port=8124&pathname=%2Fws&logging=info&reconnect=10",
-  ],
-  Array [
-    "node_modules",
-    "webpack",
-    "hot",
-    "only-dev-server.js",
-  ],
-  Array [
-    "foo.js",
-  ],
-]
-`;
-
-exports[`Server DevServerPlugin should create and run server with old parameters order and log deprecation warning: oldparam 1`] = `
-Array [
-  Array [
-    "client",
-    "index.js?protocol=ws%3A&hostname=localhost&port=8124&pathname=%2Fws&logging=info&reconnect=10",
-  ],
-  Array [
-    "node_modules",
-    "webpack",
-    "hot",
-    "dev-server.js",
-  ],
-  Array [
-    "foo.js",
-  ],
-]
-`;