diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..16dc11f
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,23 @@
+name: Run tests
+
+on:
+  pull_request:
+
+jobs:
+  run-tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.8, 3.11]
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip .
+      - name: Run tests
+        run: |
+          python -m unittest
diff --git a/VERSION.txt b/VERSION.txt
index 78a37ec..f33f5ed 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-0.2.4.2
\ No newline at end of file
+0.2.4.3
\ No newline at end of file
diff --git a/test.py b/test.py
new file mode 100644
index 0000000..9453875
--- /dev/null
+++ b/test.py
@@ -0,0 +1,86 @@
+import json
+import subprocess
+import unittest
+
+
+# ufbt invokation & json status output
+def ufbt_status() -> dict:
+    # Call "ufbt status --json" and return the parsed json
+    try:
+        status = subprocess.check_output(["ufbt", "status", "--json"])
+    except subprocess.CalledProcessError as e:
+        status = e.output
+    return json.loads(status)
+
+
+def ufbt_exec(args):
+    # Call "ufbt" with the given args and return the parsed json
+    return subprocess.check_output(["ufbt"] + args)
+
+
+# Test initial deployment
+class TestInitialDeployment(unittest.TestCase):
+    def test_default_deployment(self):
+        ufbt_exec(["clean"])
+        status = ufbt_status()
+        self.assertEqual(status.get("error"), "SDK is not deployed")
+
+        ufbt_exec(["update"])
+        status = ufbt_status()
+        self.assertIsNone(status.get("error"))
+        self.assertEqual(status.get("target"), "f7")
+        self.assertEqual(status.get("mode"), "channel")
+        self.assertEqual(status.get("details", {}).get("channel"), "release")
+
+    def test_customized_deployment(self):
+        ufbt_exec(["clean"])
+        status = ufbt_status()
+        self.assertEqual(status.get("error"), "SDK is not deployed")
+
+        ufbt_exec(["update", "-t", "f18", "-c", "rc"])
+        status = ufbt_status()
+        self.assertIsNone(status.get("error"))
+        self.assertEqual(status.get("target"), "f18")
+        self.assertEqual(status.get("mode"), "channel")
+        self.assertEqual(status.get("details", {}).get("channel"), "rc")
+        self.assertIn("rc", status.get("version", ""))
+
+    def test_target_switch(self):
+        ufbt_exec(["clean"])
+        status = ufbt_status()
+        self.assertEqual(status.get("error"), "SDK is not deployed")
+
+        ufbt_exec(["update"])
+        status = ufbt_status()
+        self.assertEqual(status.get("target"), "f7")
+
+        ufbt_exec(["update", "-t", "f18"])
+        status = ufbt_status()
+        self.assertEqual(status.get("target"), "f18")
+        self.assertEqual(status.get("mode"), "channel")
+        self.assertEqual(status.get("details", {}).get("channel"), "release")
+
+    def test_target_mode_switches(self):
+        ufbt_exec(["clean"])
+        status = ufbt_status()
+        self.assertEqual(status.get("error"), "SDK is not deployed")
+
+        ufbt_exec(["update"])
+        status = ufbt_status()
+        self.assertEqual(status.get("target"), "f7")
+
+        ufbt_exec(["update", "-t", "f18"])
+        status = ufbt_status()
+        self.assertEqual(status.get("target"), "f18")
+        self.assertEqual(status.get("mode"), "channel")
+
+        ufbt_exec(["update", "-b", "dev"])
+        status = ufbt_status()
+        self.assertEqual(status.get("target"), "f18")
+        self.assertEqual(status.get("mode"), "branch")
+        self.assertEqual(status.get("details", {}).get("branch"), "dev")
+
+        previous_status = status
+        ufbt_exec(["update"])
+        status = ufbt_status()
+        self.assertEqual(previous_status, status)
diff --git a/ufbt/bootstrap.py b/ufbt/bootstrap.py
index 8a6ba3e..4cefb18 100644
--- a/ufbt/bootstrap.py
+++ b/ufbt/bootstrap.py
@@ -597,25 +597,11 @@ def _add_arguments(self, parser: argparse.ArgumentParser) -> None:
 
     def _func(self, args) -> int:
         sdk_deployer = UfbtSdkDeployer(args.ufbt_home)
-        current_task = SdkDeployTask.from_args(args)
-        task_to_deploy = None
 
-        if previous_task := sdk_deployer.get_previous_task():
-            previous_task.update_from(current_task)
-            task_to_deploy = previous_task
-        else:
-            if current_task.mode:
-                task_to_deploy = current_task
-            # No previous state, use default hw target
-            if task_to_deploy and not task_to_deploy.hw_target:
-                task_to_deploy.hw_target = SdkDeployTask.DEFAULT_HW_TARGET
-            else:
-                log.warn("No previous SDK state was found, fetching latest release")
-                task_to_deploy = SdkDeployTask.default()
+        task_to_deploy = sdk_deployer.get_previous_task() or SdkDeployTask.default()
+        task_to_deploy.update_from(SdkDeployTask.from_args(args))
 
-        if not sdk_deployer.deploy(task_to_deploy):
-            return 1
-        return 0
+        return 0 if sdk_deployer.deploy(task_to_deploy) else 1
 
 
 class CleanSubcommand(CliSubcommand):