diff --git a/blackboard/blackboard.cpp b/blackboard/blackboard.cpp
index 5d15bd1..99fdda5 100644
--- a/blackboard/blackboard.cpp
+++ b/blackboard/blackboard.cpp
@@ -106,7 +106,7 @@ void Blackboard::bind_var_to_property(const StringName &p_name, Object *p_object
 }
 
 void Blackboard::unbind_var(const StringName &p_name) {
-	ERR_FAIL_COND_MSG(data.has(p_name), "Blackboard: Can't unbind variable that doesn't exist (var: " + p_name + ").");
+	ERR_FAIL_COND_MSG(!data.has(p_name), "Blackboard: Can't unbind variable that doesn't exist (var: " + p_name + ").");
 	data[p_name].unbind();
 }
 
@@ -128,7 +128,7 @@ void Blackboard::link_var(const StringName &p_name, const Ref<Blackboard> &p_tar
 }
 
 void Blackboard::_bind_methods() {
-	ClassDB::bind_method(D_METHOD("get_var", "var_name", "default", "complain"), &Blackboard::get_var, Variant(), true);
+	ClassDB::bind_method(D_METHOD("get_var", "var_name", "default", "complain"), &Blackboard::get_var, DEFVAL(Variant()), DEFVAL(true));
 	ClassDB::bind_method(D_METHOD("set_var", "var_name", "value"), &Blackboard::set_var);
 	ClassDB::bind_method(D_METHOD("has_var", "var_name"), &Blackboard::has_var);
 	ClassDB::bind_method(D_METHOD("set_parent", "blackboard"), &Blackboard::set_parent);
diff --git a/blackboard/blackboard.h b/blackboard/blackboard.h
index 5e60ed7..49288e1 100644
--- a/blackboard/blackboard.h
+++ b/blackboard/blackboard.h
@@ -46,7 +46,7 @@ public:
 
 	Ref<Blackboard> top() const;
 
-	Variant get_var(const StringName &p_name, const Variant &p_default, bool p_complain = true) const;
+	Variant get_var(const StringName &p_name, const Variant &p_default = Variant(), bool p_complain = true) const;
 	void set_var(const StringName &p_name, const Variant &p_value);
 	bool has_var(const StringName &p_name) const;
 	void erase_var(const StringName &p_name);
diff --git a/tests/test_blackboard.h b/tests/test_blackboard.h
new file mode 100644
index 0000000..5605129
--- /dev/null
+++ b/tests/test_blackboard.h
@@ -0,0 +1,186 @@
+#ifndef TEST_BLACKBOARD_H
+#define TEST_BLACKBOARD_H
+
+#include "core/variant/variant.h"
+#include "limbo_test.h"
+
+#include "modules/limboai/blackboard/blackboard.h"
+
+namespace TestBlackboard {
+
+class TestPropertyHolder : public RefCounted {
+	GDCLASS(TestPropertyHolder, RefCounted);
+
+public:
+	int property = 0;
+
+	void set_property(int p_property) { property = p_property; }
+	int get_property() { return property; }
+
+	static void _bind_methods() {
+		ClassDB::bind_method(D_METHOD("set_property", "property"), &TestPropertyHolder::set_property);
+		ClassDB::bind_method(D_METHOD("get_property"), &TestPropertyHolder::get_property);
+
+		ADD_PROPERTY(PropertyInfo(Variant::INT, "property"), "set_property", "get_property");
+	}
+};
+
+TEST_CASE("[Modules][LimboAI] Test Blackboard") {
+	Ref<Blackboard> blackboard = memnew(Blackboard);
+
+	blackboard->set_var("a", 1);
+	blackboard->set_var("b", Vector2(2, 2));
+	blackboard->set_var("c", String("3"));
+
+	Variant not_found("not_found");
+
+	SUBCASE("Test getter") {
+		CHECK_EQ(blackboard->get_var("a", not_found), Variant(1));
+		CHECK_EQ(blackboard->get_var("b", not_found), Variant(Vector2(2, 2)));
+		CHECK_EQ(blackboard->get_var("c", not_found), Variant("3"));
+	}
+
+	SUBCASE("Test has_var()") {
+		CHECK(blackboard->has_var("a"));
+		CHECK(blackboard->has_var("b"));
+		CHECK(blackboard->has_var("c"));
+		CHECK_FALSE(blackboard->has_var("d"));
+	}
+
+	SUBCASE("Test erase_var()") {
+		blackboard->erase_var("b");
+		CHECK_FALSE(blackboard->has_var("b"));
+		CHECK(blackboard->has_var("a"));
+		CHECK(blackboard->has_var("c"));
+	}
+
+	SUBCASE("Test clear()") {
+		blackboard->clear();
+		CHECK_FALSE(blackboard->has_var("a"));
+		CHECK_FALSE(blackboard->has_var("b"));
+		CHECK_FALSE(blackboard->has_var("c"));
+	}
+
+	SUBCASE("Test list_vars()") {
+		TypedArray<StringName> vars = blackboard->list_vars();
+		CHECK_EQ(vars.size(), 3);
+		CHECK(vars.has("a"));
+		CHECK(vars.has("b"));
+		CHECK(vars.has("c"));
+	}
+
+	SUBCASE("Test get_vars_as_dict()") {
+		Dictionary dict = blackboard->get_vars_as_dict();
+		CHECK_EQ(dict.size(), 3);
+		CHECK(dict.has("a"));
+		CHECK(dict.has("b"));
+		CHECK(dict.has("c"));
+		CHECK_EQ(dict["a"], Variant(1));
+		CHECK_EQ(dict["b"], Variant(Vector2(2, 2)));
+		CHECK_EQ(dict["c"], Variant("3"));
+
+		// * Should not include parent scope values
+		Ref<Blackboard> parent_scope = memnew(Blackboard);
+		blackboard->set_parent(parent_scope);
+		parent_scope->set_var("d", 1);
+		dict = blackboard->get_vars_as_dict();
+		CHECK_EQ(dict.size(), 3);
+		CHECK_FALSE(dict.has("d"));
+	}
+
+	SUBCASE("Test populate_from_dict() overriding values") {
+		Dictionary dict;
+		dict["a"] = "value_a";
+		dict["b"] = "value_b";
+		dict["c"] = "value_c";
+		blackboard->populate_from_dict(dict);
+
+		CHECK_EQ(blackboard->list_vars().size(), 3);
+		CHECK_EQ(blackboard->get_var("a", not_found), Variant("value_a"));
+		CHECK_EQ(blackboard->get_var("b", not_found), Variant("value_b"));
+		CHECK_EQ(blackboard->get_var("c", not_found), Variant("value_c"));
+	}
+
+	SUBCASE("Test populate_from_dict() creating new values") {
+		Dictionary dict;
+		dict["d"] = "value_d";
+		dict["e"] = "value_e";
+		blackboard->populate_from_dict(dict);
+
+		CHECK_EQ(blackboard->list_vars().size(), 5);
+		CHECK_EQ(blackboard->get_var("d", not_found), Variant("value_d"));
+		CHECK_EQ(blackboard->get_var("e", not_found), Variant("value_e"));
+	}
+
+	SUBCASE("Test scoping") {
+		CHECK_EQ(blackboard->top(), blackboard);
+
+		Ref<Blackboard> parent_scope = memnew(Blackboard);
+		blackboard->set_parent(parent_scope);
+		CHECK_EQ(blackboard->get_parent(), parent_scope);
+		CHECK_EQ(blackboard->top(), parent_scope);
+
+		parent_scope->set_var("a", 5);
+		CHECK_EQ(blackboard->get_var("a", not_found), Variant(1)); // * should return current scope value
+		CHECK_EQ(parent_scope->get_var("a", not_found), Variant(5)); // * should return parent scope value
+		CHECK_EQ(parent_scope->get_var("b", not_found, false), not_found); // * should not return current scope value
+
+		parent_scope->set_var("d", 123);
+		CHECK_EQ(blackboard->get_var("d", not_found), Variant(123)); // * should return parent scope value
+
+		blackboard->set_var("d", 456);
+		CHECK_EQ(blackboard->get_var("d", not_found), Variant(456)); // * should return new value
+		CHECK_EQ(parent_scope->get_var("d", not_found), Variant(123)); // * should return parent scope value
+
+		Ref<Blackboard> grand_parent_scope = memnew(Blackboard);
+		parent_scope->set_parent(grand_parent_scope);
+		CHECK_EQ(blackboard->top(), grand_parent_scope);
+
+		grand_parent_scope->set_var("a", "value_found");
+		CHECK_EQ(grand_parent_scope->get_var("a", not_found), Variant("value_found"));
+		CHECK_EQ(grand_parent_scope->get_var("b", not_found, false), not_found);
+		CHECK_EQ(grand_parent_scope->get_var("c", not_found, false), not_found);
+		CHECK_EQ(grand_parent_scope->get_var("d", not_found, false), not_found);
+		CHECK_EQ(parent_scope->get_var("a", not_found), Variant(5));
+		CHECK_EQ(blackboard->get_var("a", not_found), Variant(1));
+	}
+
+	SUBCASE("Test binding") {
+		Ref<TestPropertyHolder> holder = memnew(TestPropertyHolder);
+		blackboard->bind_var_to_property("a", holder.ptr(), "property");
+
+		holder->set_property(5);
+		CHECK_EQ(blackboard->get_var("a", not_found), Variant(5));
+		blackboard->set_var("a", Variant(6));
+		CHECK_EQ(holder->get_property(), 6);
+
+		blackboard->unbind_var("a");
+		blackboard->set_var("a", Variant(7));
+		CHECK_EQ(holder->get_property(), 6);
+		CHECK_EQ(blackboard->get_var("a", not_found), Variant(7));
+	}
+
+	SUBCASE("Test linking") {
+		Ref<Blackboard> target_blackboard = memnew(Blackboard);
+
+		target_blackboard->set_var("aa", Variant(111));
+		blackboard->link_var("a", target_blackboard, "aa");
+		CHECK(target_blackboard->has_var("aa"));
+		CHECK_FALSE(target_blackboard->has_var("a"));
+
+		CHECK_EQ(blackboard->get_var("a", not_found), Variant(111));
+		CHECK_EQ(target_blackboard->get_var("aa", not_found), Variant(111));
+
+		blackboard->set_var("a", Variant(222));
+		CHECK_EQ(blackboard->get_var("a", not_found), Variant(222));
+		CHECK_EQ(target_blackboard->get_var("aa", not_found), Variant(222));
+
+		target_blackboard->set_var("aa", Variant(333));
+		CHECK_EQ(blackboard->get_var("a", not_found), Variant(333));
+		CHECK_EQ(target_blackboard->get_var("aa", not_found), Variant(333));
+	}
+}
+
+} //namespace TestBlackboard
+
+#endif // TEST_BLACKBOARD_H