diff --git a/tests/test_check_var.h b/tests/test_check_var.h
new file mode 100644
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--- /dev/null
+++ b/tests/test_check_var.h
@@ -0,0 +1,100 @@
+/**
+ * test_check_var.h
+ * =============================================================================
+ * Copyright 2021-2023 Serhii Snitsaruk
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ * =============================================================================
+ */
+#ifndef TEST_CHECK_VAR_H
+#define TEST_CHECK_VAR_H
+
+#include "limbo_test.h"
+
+#include "modules/limboai/blackboard/bb_param/bb_param.h"
+#include "modules/limboai/bt/tasks/blackboard/bt_check_var.h"
+#include "modules/limboai/bt/tasks/bt_task.h"
+#include "modules/limboai/util/limbo_utility.h"
+
+namespace TestCheckVar {
+
+// Compare m_correct, m_incorrect and m_invalid to m_value based using m_check_type.
+#define TC_CHECK_VALUES(m_task, m_correct, m_incorrect, m_invalid, m_check_type, m_value) \
+	m_task->get_value()->set_saved_value(m_value);                                        \
+	m_task->set_check_type(m_check_type);                                                 \
+	m_task->get_blackboard()->set_var("var", m_correct);                                  \
+	CHECK(m_task->execute(0.01666) == BTTask::SUCCESS);                                   \
+	m_task->get_blackboard()->set_var("var", m_incorrect);                                \
+	CHECK(m_task->execute(0.01666) == BTTask::FAILURE);                                   \
+	m_task->get_blackboard()->set_var("var", m_invalid);                                  \
+	CHECK(m_task->execute(0.01666) == BTTask::FAILURE);
+
+TEST_CASE("[Modules][LimboAI] BTCheckVar") {
+	Ref<BTCheckVar> cv = memnew(BTCheckVar);
+	Ref<Blackboard> bb = memnew(Blackboard);
+	Node *dummy = memnew(Node);
+	cv->initialize(dummy, bb);
+
+	SUBCASE("Check with empty variable and value") {
+		ERR_PRINT_OFF;
+		cv->set_variable("");
+		cv->set_value(nullptr);
+		CHECK(cv->execute(0.01666) == BTTask::FAILURE);
+		ERR_PRINT_ON;
+	}
+	SUBCASE("With variable and value set") {
+		cv->set_variable("var");
+		Ref<BBVariant> value = memnew(BBVariant);
+		cv->set_value(value);
+
+		SUBCASE("When checking against another variable") {
+			cv->set_check_type(LimboUtility::CHECK_EQUAL);
+			value->set_value_source(BBParam::BLACKBOARD_VAR);
+			value->set_variable("compare_var");
+			bb->set_var("var", 123);
+			bb->set_var("compare_var", 123);
+			CHECK(cv->execute(0.01666) == BTTask::SUCCESS);
+			bb->set_var("compare_var", 567);
+			CHECK(cv->execute(0.01666) == BTTask::FAILURE);
+		}
+
+		value->set_value_source(BBParam::SAVED_VALUE);
+
+		SUBCASE("With integer") {
+			TC_CHECK_VALUES(cv, 5, 4, "5", LimboUtility::CHECK_EQUAL, 5);
+			TC_CHECK_VALUES(cv, 5, 4, "5", LimboUtility::CHECK_GREATER_THAN_OR_EQUAL, 5);
+			TC_CHECK_VALUES(cv, 6, 4, "6", LimboUtility::CHECK_GREATER_THAN, 5);
+			TC_CHECK_VALUES(cv, 5, 6, "5", LimboUtility::CHECK_LESS_THAN_OR_EQUAL, 5);
+			TC_CHECK_VALUES(cv, 4, 6, "4", LimboUtility::CHECK_LESS_THAN, 5);
+			TC_CHECK_VALUES(cv, 4, 5, "4", LimboUtility::CHECK_NOT_EQUAL, 5);
+		}
+		SUBCASE("With bool") {
+			TC_CHECK_VALUES(cv, true, false, "true", LimboUtility::CHECK_EQUAL, true);
+			TC_CHECK_VALUES(cv, true, false, "true", LimboUtility::CHECK_NOT_EQUAL, false);
+		}
+		SUBCASE("With float") {
+			TC_CHECK_VALUES(cv, 3.14, 3.0, "3.14", LimboUtility::CHECK_EQUAL, 3.14);
+			TC_CHECK_VALUES(cv, 3.14, 3.0, "3.14", LimboUtility::CHECK_GREATER_THAN_OR_EQUAL, 3.14);
+			TC_CHECK_VALUES(cv, 4.0, 3.0, "4.0", LimboUtility::CHECK_GREATER_THAN, 3.14);
+			TC_CHECK_VALUES(cv, 3.14, 4.0, "3.14", LimboUtility::CHECK_LESS_THAN_OR_EQUAL, 3.14);
+			TC_CHECK_VALUES(cv, 3.0, 4.0, "3.0", LimboUtility::CHECK_LESS_THAN, 3.14);
+			TC_CHECK_VALUES(cv, 3.0, 3.14, "3.0", LimboUtility::CHECK_NOT_EQUAL, 3.14);
+		}
+		SUBCASE("With string") {
+			TC_CHECK_VALUES(cv, "AAA", "AAC", 123, LimboUtility::CHECK_EQUAL, "AAA");
+			TC_CHECK_VALUES(cv, "AAC", "AAA", 123, LimboUtility::CHECK_GREATER_THAN_OR_EQUAL, "AAB");
+			TC_CHECK_VALUES(cv, "AAC", "AAA", 123, LimboUtility::CHECK_GREATER_THAN, "AAB");
+			TC_CHECK_VALUES(cv, "AAA", "AAC", 123, LimboUtility::CHECK_LESS_THAN_OR_EQUAL, "AAB");
+			TC_CHECK_VALUES(cv, "AAA", "AAC", 123, LimboUtility::CHECK_LESS_THAN, "AAB");
+			TC_CHECK_VALUES(cv, "AAA", "AAB", 123, LimboUtility::CHECK_NOT_EQUAL, "AAB");
+		}
+	}
+
+	memdelete(dummy);
+}
+
+} //namespace TestCheckVar
+
+#endif // TEST_CHECK_VAR_H