diff --git a/src/unittest/test_clientactiveobjectmgr.cpp b/src/unittest/test_clientactiveobjectmgr.cpp
index 2d508cf32..c3ec40637 100644
--- a/src/unittest/test_clientactiveobjectmgr.cpp
+++ b/src/unittest/test_clientactiveobjectmgr.cpp
@@ -32,6 +32,24 @@ public:
 	virtual void addToScene(ITextureSource *tsrc, scene::ISceneManager *smgr) {}
 };
 
+class TestSelectableClientActiveObject : public ClientActiveObject
+{
+public:
+	TestSelectableClientActiveObject(aabb3f _selection_box)
+		: ClientActiveObject(0, nullptr, nullptr)
+		, selection_box(_selection_box)
+	{}
+
+	~TestSelectableClientActiveObject() = default;
+	ActiveObjectType getType() const override { return ACTIVEOBJECT_TYPE_TEST; }
+	void addToScene(ITextureSource *tsrc, scene::ISceneManager *smgr) override {}
+	bool getSelectionBox(aabb3f *toset) const override { *toset = selection_box; return true; }
+	const v3f getPosition() const override { return position; }
+
+	v3f position;
+	aabb3f selection_box;
+};
+
 class TestClientActiveObjectMgr : public TestBase
 {
 public:
@@ -43,6 +61,7 @@ public:
 	void testFreeID();
 	void testRegisterObject();
 	void testRemoveObject();
+	void testGetActiveSelectableObjects();
 };
 
 static TestClientActiveObjectMgr g_test_instance;
@@ -52,6 +71,7 @@ void TestClientActiveObjectMgr::runTests(IGameDef *gamedef)
 	TEST(testFreeID);
 	TEST(testRegisterObject)
 	TEST(testRemoveObject)
+	TEST(testGetActiveSelectableObjects)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -116,3 +136,48 @@ void TestClientActiveObjectMgr::testRemoveObject()
 
 	caomgr.clear();
 }
+
+void TestClientActiveObjectMgr::testGetActiveSelectableObjects()
+{
+	client::ActiveObjectMgr caomgr;
+	auto obj = new TestSelectableClientActiveObject({v3f{-1, -1, -1}, v3f{1, 1, 1}});
+	UASSERT(caomgr.registerObject(obj));
+
+	auto assert_obj_selected = [&] (v3f a, v3f b) {
+		auto actual = caomgr.getActiveSelectableObjects({a, b});
+		UASSERTEQ(auto, actual.size(), 1u);
+		UASSERTEQ(auto, actual.at(0).obj, obj);
+	};
+
+	auto assert_obj_missed = [&] (v3f a, v3f b) {
+		auto actual = caomgr.getActiveSelectableObjects({a, b});
+		UASSERTEQ(auto, actual.size(), 0u);
+	};
+
+	float x = 12, y = 3, z = 6;
+	obj->position = {x, y, z};
+
+	assert_obj_selected({0, 0, 0}, {x-1, y-1, z-1});
+	assert_obj_selected({0, 0, 0}, {2*(x-1), 2*(y-1), 2*(z-1)});
+	assert_obj_selected({0, 0, 0}, {2*(x+1), 2*(y-1), 2*(z+1)});
+	assert_obj_selected({0, 0, 0}, {20, 5, 10});
+
+	assert_obj_selected({30, -12, 17}, {x+1, y+1, z-1});
+	assert_obj_selected({30, -12, 17}, {x, y+1, z});
+	assert_obj_selected({30, -12, 17}, {-6, 20, -5});
+	assert_obj_selected({30, -12, 17}, {-8, 20, -7});
+
+	assert_obj_selected({-21, 6, -13}, {x+1.4f, y, z});
+	assert_obj_selected({-21, 6, -13}, {x-1.4f, y, z});
+	assert_obj_missed({-21, 6, -13}, {x-3.f, y, z});
+
+	assert_obj_selected({-21, 6, -13}, {x, y-1.4f, z});
+	assert_obj_selected({-21, 6, -13}, {x, y+1.4f, z});
+	assert_obj_missed({-21, 6, -13}, {x, y+3.f, z});
+
+	assert_obj_selected({-21, 6, -13}, {x, y, z+1.4f});
+	assert_obj_selected({-21, 6, -13}, {x, y, z-1.4f});
+	assert_obj_missed({-21, 6, -13}, {x, y, z-3.f});
+
+	caomgr.clear();
+}