diff --git a/bazel/labgrid/client/common.py b/bazel/labgrid/client/common.py
index f8d9c5027a329733d4b0725c7ff6055cb151e8be..3995fa48478cdfecc227211faa0dad68eab091ba 100644
--- a/bazel/labgrid/client/common.py
+++ b/bazel/labgrid/client/common.py
@@ -35,4 +35,4 @@ def labgrid_client(*args, env=None, timeout=10, output_as_yaml=True, url=""):
             return yaml.safe_load(process.stdout)
         return process.stdout
     else:
-        return {}
+        return {} if output_as_yaml else ""
diff --git a/bazel/labgrid/local/BUILD.bazel b/bazel/labgrid/local/BUILD.bazel
index d67d53fcdb6c2531669e21c0813aa2838a63a48e..0575aeac3131b46e04c67f95f4f504d5f4cdf3ec 100644
--- a/bazel/labgrid/local/BUILD.bazel
+++ b/bazel/labgrid/local/BUILD.bazel
@@ -15,6 +15,7 @@ py_library(
     visibility = [
         "//bazel/labgrid/client:__pkg__",
         "//bazel/labgrid/local:__pkg__",
+        "//bazel/labgrid/manager:__pkg__",
     ],
     deps = [
         "//labgrid:pkg",
diff --git a/bazel/labgrid/manager/BUILD.bazel b/bazel/labgrid/manager/BUILD.bazel
index 7b66fd3021d70473625ae0eada4a83fd1c12c979..ae381a0cb2d44bfd5d71cfee07b9060b23f3b534 100644
--- a/bazel/labgrid/manager/BUILD.bazel
+++ b/bazel/labgrid/manager/BUILD.bazel
@@ -1,4 +1,4 @@
-load("@rules_python//python:defs.bzl", "py_library")
+load("@rules_python//python:defs.bzl", "py_library", "py_test")
 
 py_library(
     name = "manager",
@@ -42,3 +42,17 @@ py_library(
         "@rules_python//python/runfiles",
     ],
 )
+
+py_test(
+    name = "test",
+    size = "small",
+    srcs = ["test.py"],
+    visibility = ["//visibility:public"],
+    deps = [
+        ":acquire",
+        ":reserve",
+        "//bazel/labgrid/client",
+        "//bazel/labgrid/local",
+        "@rules_python//python/runfiles",
+    ],
+)
diff --git a/bazel/labgrid/manager/test.py b/bazel/labgrid/manager/test.py
new file mode 100644
index 0000000000000000000000000000000000000000..0a1e87e6ac484cc7185599f19c0856a7f6e3b347
--- /dev/null
+++ b/bazel/labgrid/manager/test.py
@@ -0,0 +1,86 @@
+from unittest import TestCase, main
+
+from bazel.labgrid.local import harness
+from bazel.labgrid.client import labgrid_client
+from bazel.labgrid.manager.reserve import manager as reserve_manager
+from bazel.labgrid.manager.acquire import manager as acquire_manager
+from bazel.labgrid.manager import Data
+
+
+class ManagersTestCase(TestCase):
+    @classmethod
+    def setUpClass(cls) -> None:
+        cls.place = "test_place"
+        cls.host = "test_host"
+        cls.user = "test_user"
+        cls.__cm = harness(tags={"device": "fake"}, place=cls.place)
+        cls.harness = cls.__cm.__enter__()
+
+    @classmethod
+    def tearDownClass(cls) -> None:
+        cls.__cm.__exit__(None, None, None)
+
+    def client(self, *args: str) -> str:
+        env = {"LG_COORDINATOR": self.harness.coordinator_url}
+        return labgrid_client(*args, env=env, output_as_yaml=False)
+
+    def test_reserve_manager(self) -> None:
+        stdout = self.client("reservations")
+        self.assertEqual(stdout, "")
+
+        env = {
+            "BZL_LG_TAGS": "device=fake",
+            "LG_COORDINATOR": self.harness.coordinator_url,
+        }
+        with reserve_manager(Data(env=env)):
+            stdout = self.client("reservations")
+            self.assertIn("state: allocated", stdout)
+            self.assertIn(f"main: {self.place}", stdout)
+
+        stdout = self.client("reservations")
+        self.assertEqual(stdout, "")
+
+    def test_acquire_manager(self) -> None:
+        stdout = self.client("-vv", "places")
+        self.assertIn("acquired: None", stdout)
+
+        env = {
+            "LG_PLACE": self.place,
+            "LG_COORDINATOR": self.harness.coordinator_url,
+            "LG_HOSTNAME": self.host,
+            "LG_USERNAME": self.user,
+        }
+
+        with acquire_manager(Data(env=env)):
+            stdout = self.client("-vv", "places")
+            self.assertIn(f"acquired: {self.host}/{self.user}", stdout)
+
+        stdout = self.client("-vv", "places")
+        self.assertIn("acquired: None", stdout)
+
+    def test_reserve_then_acquire_manager(self) -> None:
+        stdout = self.client("reservations")
+        self.assertEqual(stdout, "")
+
+        env = {
+            "BZL_LG_TAGS": "device=fake",
+            "LG_COORDINATOR": self.harness.coordinator_url,
+            "LG_HOSTNAME": self.host,
+            "LG_USERNAME": self.user,
+        }
+        with reserve_manager(Data(env=env)) as reserve_env:
+            with acquire_manager(reserve_env):
+                stdout = self.client("-vv", "places")
+                self.assertIn(f"acquired: {self.host}/{self.user}", stdout)
+
+        # Place no longer acquired.
+        stdout = self.client("-vv", "places")
+        self.assertIn("acquired: None", stdout)
+
+        # No Reservations.
+        stdout = self.client("reservations")
+        self.assertEqual(stdout, "")
+
+
+if __name__ == "__main__":
+    main()