diff --git a/test/extension/commands/configEASBuild.test.ts b/test/extension/commands/configEASBuild.test.ts
new file mode 100644
index 000000000..d07c79400
--- /dev/null
+++ b/test/extension/commands/configEASBuild.test.ts
@@ -0,0 +1,122 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for details.
+
+import assert = require("assert");
+import Sinon = require("sinon");
+import proxyquire = require("proxyquire");
+
+suite("configEASBuildCommand", function () {
+    function createMockProject(projectPath: string, isExpoStub: Sinon.SinonStub): any {
+        return {
+            getPackager: () => ({
+                getProjectPath: () => projectPath,
+            }),
+            getExponentHelper: () => ({
+                isExpoManagedApp: isExpoStub,
+            }),
+        };
+    }
+
+    function createCommandModule(
+        existsStub: Sinon.SinonStub,
+        executeStub: Sinon.SinonStub,
+        logger = {
+            info: Sinon.stub(),
+            error: Sinon.stub(),
+            warning: Sinon.stub(),
+            debug: Sinon.stub(),
+        },
+    ) {
+        class FakeFileSystem {
+            public exists = existsStub;
+        }
+
+        class FakeCommandExecutor {
+            public execute = executeStub;
+        }
+
+        const module = proxyquire.noCallThru()("../../../src/extension/commands/configEASBuild", {
+            "../../common/node/fileSystem": {
+                FileSystem: FakeFileSystem,
+            },
+            "../../common/commandExecutor": {
+                CommandExecutor: FakeCommandExecutor,
+            },
+            "../log/OutputChannelLogger": {
+                OutputChannelLogger: {
+                    getMainChannel: () => logger,
+                },
+            },
+        }) as typeof import("../../../src/extension/commands/configEASBuild");
+
+        return {
+            ConfigEASBuild: module.ConfigEASBuild,
+            logger,
+        };
+    }
+
+    async function runCommand(
+        commandClass: typeof import("../../../src/extension/commands/configEASBuild").ConfigEASBuild,
+        projectPath: string,
+        isExpoStub: Sinon.SinonStub,
+    ): Promise<void> {
+        const command = commandClass.formInstance();
+        (command as any).project = createMockProject(projectPath, isExpoStub);
+        (command as any).nodeModulesRoot = `${projectPath}/node_modules`;
+        await command.baseFn();
+    }
+
+    test("should reject non-Expo projects", async function () {
+        const existsStub = Sinon.stub().returns(Promise.resolve(false));
+        const executeStub = Sinon.stub().returns(Promise.resolve());
+        const isExpoStub = Sinon.stub().returns(Promise.resolve(false));
+        const { ConfigEASBuild } = createCommandModule(existsStub, executeStub);
+
+        await assert.rejects(
+            runCommand(ConfigEASBuild, "/workspace/app", isExpoStub),
+            /not an Expo application/,
+        );
+
+        assert.strictEqual(isExpoStub.calledWithExactly(true), true);
+        assert.strictEqual(existsStub.called, false);
+        assert.strictEqual(executeStub.called, false);
+    });
+
+    test("should return early when eas.json already exists", async function () {
+        const existsStub = Sinon.stub().returns(Promise.resolve(true));
+        const executeStub = Sinon.stub().returns(Promise.resolve());
+        const isExpoStub = Sinon.stub().returns(Promise.resolve(true));
+        const { ConfigEASBuild, logger } = createCommandModule(existsStub, executeStub);
+
+        await runCommand(ConfigEASBuild, "/workspace/app", isExpoStub);
+
+        assert.strictEqual(existsStub.calledWithExactly("/workspace/app/eas.json"), true);
+        assert.strictEqual(executeStub.called, false);
+        assert.strictEqual(
+            logger.info.args.some((args: string[]) =>
+                args[0].includes("eas.json file already existing"),
+            ),
+            true,
+        );
+    });
+
+    test("should run eas build configure for Expo projects without eas.json", async function () {
+        const existsStub = Sinon.stub().returns(Promise.resolve(false));
+        const executeStub = Sinon.stub().returns(Promise.resolve());
+        const isExpoStub = Sinon.stub().returns(Promise.resolve(true));
+        const { ConfigEASBuild, logger } = createCommandModule(existsStub, executeStub);
+
+        await runCommand(ConfigEASBuild, "/workspace/app", isExpoStub);
+
+        assert.strictEqual(
+            executeStub.calledWithExactly("eas build:configure --platform all"),
+            true,
+        );
+        assert.strictEqual(
+            logger.info.args.some((args: string[]) =>
+                args[0].includes("Create EAS build config file successfully"),
+            ),
+            true,
+        );
+    });
+});
diff --git a/test/extension/commands/enableHermes.test.ts b/test/extension/commands/enableHermes.test.ts
new file mode 100644
index 000000000..5a8dbf68d
--- /dev/null
+++ b/test/extension/commands/enableHermes.test.ts
@@ -0,0 +1,168 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for details.
+
+import assert = require("assert");
+import * as fs from "fs";
+import * as os from "os";
+import * as path from "path";
+import Sinon = require("sinon");
+import proxyquire = require("proxyquire");
+
+suite("enableHermesCommand", function () {
+    let tempDir: string;
+
+    function removeDirRecursive(dirPath: string): void {
+        if (fs.existsSync(dirPath)) {
+            fs.readdirSync(dirPath).forEach(file => {
+                const currentPath = path.join(dirPath, file);
+                if (fs.lstatSync(currentPath).isDirectory()) {
+                    removeDirRecursive(currentPath);
+                } else {
+                    fs.unlinkSync(currentPath);
+                }
+            });
+            fs.rmdirSync(dirPath);
+        }
+    }
+
+    function createMockProject(projectPath: string): any {
+        return {
+            getPackager: () => ({
+                getProjectPath: () => projectPath,
+            }),
+        };
+    }
+
+    function createCommandModule(
+        showQuickPickStub: Sinon.SinonStub,
+        writeFileStub: Sinon.SinonStub,
+        spawnStub: Sinon.SinonStub,
+        logger = {
+            info: Sinon.stub(),
+            error: Sinon.stub(),
+            warning: Sinon.stub(),
+            debug: Sinon.stub(),
+        },
+    ) {
+        class FakeFileSystem {
+            public writeFile = writeFileStub;
+        }
+
+        class FakeCommandExecutor {
+            public spawn = spawnStub;
+        }
+
+        const module = proxyquire.noCallThru()("../../../src/extension/commands/enableHermes", {
+            vscode: {
+                window: {
+                    showQuickPick: showQuickPickStub,
+                },
+            },
+            "../../common/node/fileSystem": {
+                FileSystem: FakeFileSystem,
+            },
+            "../../common/commandExecutor": {
+                CommandExecutor: FakeCommandExecutor,
+            },
+            "../appLauncher": {
+                AppLauncher: {
+                    getNodeModulesRootByProjectPath: () => path.join(tempDir, "node_modules"),
+                },
+            },
+            "../log/OutputChannelLogger": {
+                OutputChannelLogger: {
+                    getMainChannel: () => logger,
+                },
+            },
+        }) as typeof import("../../../src/extension/commands/enableHermes");
+
+        return {
+            EnableHermes: module.EnableHermes,
+            logger,
+        };
+    }
+
+    async function runCommand(
+        commandClass: typeof import("../../../src/extension/commands/enableHermes").EnableHermes,
+    ): Promise<void> {
+        const command = commandClass.formInstance();
+        (command as any).project = createMockProject(tempDir);
+        await command.baseFn();
+    }
+
+    setup(function () {
+        tempDir = fs.mkdtempSync(path.join(os.tmpdir(), "enableHermes-test-"));
+    });
+
+    teardown(function () {
+        removeDirRecursive(tempDir);
+    });
+
+    test("should warn when iOS Podfile is missing", async function () {
+        const showQuickPickStub = Sinon.stub();
+        showQuickPickStub.onFirstCall().returns(Promise.resolve("iOS"));
+        showQuickPickStub.onSecondCall().returns(Promise.resolve("true"));
+        const writeFileStub = Sinon.stub().returns(Promise.resolve());
+        const spawnStub = Sinon.stub().returns(Promise.resolve());
+        const { EnableHermes, logger } = createCommandModule(
+            showQuickPickStub,
+            writeFileStub,
+            spawnStub,
+        );
+
+        await runCommand(EnableHermes);
+
+        assert.strictEqual(logger.warning.calledWithExactly("Podfile not found"), true);
+        assert.strictEqual(writeFileStub.called, false);
+        assert.strictEqual(spawnStub.called, false);
+    });
+
+    test("should update Android hermesEnabled property", async function () {
+        const androidPath = path.join(tempDir, "android");
+        const gradleFilePath = path.join(androidPath, "gradle.properties");
+        fs.mkdirSync(androidPath, { recursive: true });
+        fs.writeFileSync(gradleFilePath, "android.useAndroidX=true\nhermesEnabled=false");
+        const showQuickPickStub = Sinon.stub();
+        showQuickPickStub.onFirstCall().returns(Promise.resolve("Android"));
+        showQuickPickStub.onSecondCall().returns(Promise.resolve("true"));
+        const writeFileStub = Sinon.stub().returns(Promise.resolve());
+        const spawnStub = Sinon.stub().returns(Promise.resolve());
+        const { EnableHermes } = createCommandModule(showQuickPickStub, writeFileStub, spawnStub);
+
+        await runCommand(EnableHermes);
+
+        assert.strictEqual(writeFileStub.calledOnce, true);
+        assert.strictEqual(writeFileStub.firstCall.args[0], gradleFilePath);
+        assert.strictEqual(
+            writeFileStub.firstCall.args[1],
+            "android.useAndroidX=true\nhermesEnabled=true",
+        );
+        assert.strictEqual(spawnStub.called, false);
+    });
+
+    test("should update iOS hermes flag and install pods", async function () {
+        const iosPath = path.join(tempDir, "ios");
+        const podfilePath = path.join(iosPath, "Podfile");
+        fs.mkdirSync(iosPath, { recursive: true });
+        fs.writeFileSync(
+            podfilePath,
+            "use_react_native!(\n    :path => config[:reactNativePath],\n    :hermes_enabled => false\n)",
+        );
+        const showQuickPickStub = Sinon.stub();
+        showQuickPickStub.onFirstCall().returns(Promise.resolve("iOS"));
+        showQuickPickStub.onSecondCall().returns(Promise.resolve("true"));
+        const writeFileStub = Sinon.stub().returns(Promise.resolve());
+        const spawnStub = Sinon.stub().returns(Promise.resolve());
+        const { EnableHermes } = createCommandModule(showQuickPickStub, writeFileStub, spawnStub);
+
+        await runCommand(EnableHermes);
+
+        assert.strictEqual(writeFileStub.calledOnce, true);
+        assert.strictEqual(writeFileStub.firstCall.args[0], podfilePath);
+        assert.strictEqual(
+            writeFileStub.firstCall.args[1].includes(":hermes_enabled => true"),
+            true,
+        );
+        assert.strictEqual(spawnStub.calledWithExactly("pod", ["install"]), true);
+    });
+});
diff --git a/test/extension/commands/killPort.test.ts b/test/extension/commands/killPort.test.ts
new file mode 100644
index 000000000..76d32306e
--- /dev/null
+++ b/test/extension/commands/killPort.test.ts
@@ -0,0 +1,88 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for details.
+
+import assert = require("assert");
+import * as vscode from "vscode";
+import Sinon = require("sinon");
+import proxyquire = require("proxyquire");
+
+suite("killPortCommand", function () {
+    let showInputBoxStub: Sinon.SinonStub;
+
+    function createCommandModule(
+        execStub: Sinon.SinonStub,
+        logger = {
+            info: Sinon.stub(),
+            error: Sinon.stub(),
+            warning: Sinon.stub(),
+            debug: Sinon.stub(),
+        },
+    ) {
+        class FakeChildProcess {
+            public exec = execStub;
+        }
+
+        const module = proxyquire.noCallThru()("../../../src/extension/commands/killPort", {
+            "../../common/node/childProcess": {
+                ChildProcess: FakeChildProcess,
+            },
+            "../../common/utils": {
+                wait: () => Promise.resolve(),
+            },
+            "../log/OutputChannelLogger": {
+                OutputChannelLogger: {
+                    getMainChannel: () => logger,
+                },
+            },
+        }) as typeof import("../../../src/extension/commands/killPort");
+
+        return {
+            KillPort: module.killPort,
+            logger,
+        };
+    }
+
+    function createExecResult(outcome: string): any {
+        return Promise.resolve({
+            process: {},
+            outcome: Promise.resolve(outcome),
+        });
+    }
+
+    teardown(function () {
+        if (showInputBoxStub) {
+            showInputBoxStub.restore();
+        }
+    });
+
+    test("should do nothing when port input is empty", async function () {
+        showInputBoxStub = Sinon.stub(vscode.window, "showInputBox").returns(Promise.resolve(""));
+        const execStub = Sinon.stub().returns(createExecResult(""));
+        const { KillPort } = createCommandModule(execStub);
+        const command = KillPort.formInstance();
+        (command as any).project = {};
+
+        await command.baseFn();
+
+        assert.strictEqual(execStub.called, false);
+    });
+
+    test("should kill the selected port", async function () {
+        showInputBoxStub = Sinon.stub(vscode.window, "showInputBox").returns(
+            Promise.resolve("8081"),
+        );
+        const execStub = Sinon.stub().returns(createExecResult("killed"));
+        const { KillPort, logger } = createCommandModule(execStub);
+        const command = KillPort.formInstance();
+        (command as any).project = {};
+
+        await command.baseFn();
+
+        assert.strictEqual(execStub.calledWithExactly("npx kill-port 8081"), true);
+        assert.strictEqual(
+            logger.info.args.some((args: string[]) => args[0].includes("killing port 8081")),
+            true,
+        );
+        assert.strictEqual(logger.info.calledWithExactly("killed"), true);
+    });
+});
diff --git a/test/extension/commands/prebuild.test.ts b/test/extension/commands/prebuild.test.ts
new file mode 100644
index 000000000..3657a8e50
--- /dev/null
+++ b/test/extension/commands/prebuild.test.ts
@@ -0,0 +1,64 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for details.
+
+import assert = require("assert");
+import Sinon = require("sinon");
+import proxyquire = require("proxyquire");
+
+suite("prebuildCommand", function () {
+    function createMockProject(projectPath: string): any {
+        return {
+            getPackager: () => ({
+                getProjectPath: () => projectPath,
+            }),
+        };
+    }
+
+    test("should run expo prebuild from the project root", async function () {
+        const executeStub = Sinon.stub().returns(Promise.resolve());
+        const getChannelStub = Sinon.stub().returns({
+            info: Sinon.stub(),
+            error: Sinon.stub(),
+            warning: Sinon.stub(),
+            debug: Sinon.stub(),
+        });
+        const getNodeModulesRootStub = Sinon.stub().returns("/workspace/app/node_modules");
+        const constructorArgs: any[][] = [];
+
+        class FakeCommandExecutor {
+            constructor(...args: any[]) {
+                constructorArgs.push(args);
+            }
+
+            public execute = executeStub;
+        }
+
+        const module = proxyquire.noCallThru()("../../../src/extension/commands/prebuild", {
+            "../../common/commandExecutor": {
+                CommandExecutor: FakeCommandExecutor,
+            },
+            "../appLauncher": {
+                AppLauncher: {
+                    getNodeModulesRootByProjectPath: getNodeModulesRootStub,
+                },
+            },
+            "../log/OutputChannelLogger": {
+                OutputChannelLogger: {
+                    getChannel: getChannelStub,
+                },
+            },
+        }) as typeof import("../../../src/extension/commands/prebuild");
+
+        const command = module.Prebuild.formInstance();
+        (command as any).project = createMockProject("/workspace/app");
+
+        await command.baseFn();
+
+        assert.strictEqual(getNodeModulesRootStub.calledWithExactly("/workspace/app"), true);
+        assert.deepStrictEqual(constructorArgs[0].slice(0, 2), [
+            "/workspace/app/node_modules",
+            "/workspace/app",
+        ]);
+        assert.strictEqual(executeStub.calledWithExactly("npx expo prebuild"), true);
+    });
+});