diff --git a/tests/core/templates/test_oa_hash_map.h b/tests/core/templates/test_oa_hash_map.h
new file mode 100644
index 000000000000..6e80b52054ac
--- /dev/null
+++ b/tests/core/templates/test_oa_hash_map.h
@@ -0,0 +1,227 @@
+/**************************************************************************/
+/*  test_oa_hash_map.h                                                    */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef TEST_OA_HASH_MAP_H
+#define TEST_OA_HASH_MAP_H
+
+#include "core/templates/oa_hash_map.h"
+#include "scene/resources/texture.h"
+
+#include "tests/test_macros.h"
+
+namespace TestOAHashMap {
+
+TEST_CASE("[OAHashMap] Insert element") {
+	OAHashMap<int, int> map;
+	map.insert(42, 84);
+	int data = 0;
+	bool lookup_res = map.lookup(42, data);
+	int value = *map.lookup_ptr(42);
+	CHECK(lookup_res);
+	CHECK(value == 84);
+	CHECK(data == 84);
+}
+
+TEST_CASE("[OAHashMap] Set element") {
+	OAHashMap<int, int> map;
+	map.set(42, 84);
+	int data = 0;
+	bool lookup_res = map.lookup(42, data);
+	int value = *map.lookup_ptr(42);
+	CHECK(lookup_res);
+	CHECK(value == 84);
+	CHECK(data == 84);
+}
+
+TEST_CASE("[OAHashMap] Overwrite element") {
+	OAHashMap<int, int> map;
+	map.set(42, 84);
+	map.set(42, 1234);
+	int result = *map.lookup_ptr(42);
+	CHECK(result == 1234);
+}
+
+TEST_CASE("[OAHashMap] Remove element") {
+	OAHashMap<int, int> map;
+	map.insert(42, 84);
+	map.remove(42);
+	CHECK(!map.has(42));
+}
+
+TEST_CASE("[OAHashMap] Get Num_Elements") {
+	OAHashMap<int, int> map;
+	map.set(42, 84);
+	map.set(123, 84);
+	map.set(123, 84);
+	map.set(0, 84);
+	map.set(123485, 84);
+
+	CHECK(map.get_num_elements() == 4);
+}
+
+TEST_CASE("[OAHashMap] Iteration") {
+	OAHashMap<int, int> map;
+	map.insert(42, 84);
+	map.insert(123, 12385);
+	map.insert(0, 12934);
+	map.insert(123485, 1238888);
+	map.set(123, 111111);
+
+	Vector<Pair<int, int>> expected;
+	expected.push_back(Pair<int, int>(42, 84));
+	expected.push_back(Pair<int, int>(123, 111111));
+	expected.push_back(Pair<int, int>(0, 12934));
+	expected.push_back(Pair<int, int>(123485, 1238888));
+
+	int idx = 0;
+	for (OAHashMap<int, int>::Iterator it = map.iter(); it.valid; it = map.next_iter(it)) {
+		int64_t result = expected.find(Pair<int, int>(*it.key, *it.value));
+		CHECK(result >= 0);
+		idx++;
+	}
+}
+
+TEST_CASE("[OAHashMap] Insert, iterate, remove many strings") {
+	uint64_t pre_mem = Memory::get_mem_usage();
+	{
+		const int elem_max = 40;
+		OAHashMap<String, int> map;
+		for (int i = 0; i < elem_max; i++) {
+			map.insert(itos(i), i);
+		}
+
+		Vector<String> elems_still_valid;
+
+		for (int i = 0; i < elem_max; i++) {
+			if ((i % 5) == 0) {
+				map.remove(itos(i));
+			} else {
+				elems_still_valid.push_back(itos(i));
+			}
+		}
+
+		CHECK(elems_still_valid.size() == map.get_num_elements());
+
+		for (int i = 0; i < elems_still_valid.size(); i++) {
+			CHECK(map.has(elems_still_valid[i]));
+		}
+	}
+
+	CHECK(Memory::get_mem_usage() == pre_mem);
+}
+
+TEST_CASE("[OAHashMap] Clear") {
+	OAHashMap<int, int> map;
+	map.insert(42, 84);
+	map.insert(0, 1234);
+	map.clear();
+	CHECK(!map.has(42));
+	CHECK(!map.has(0));
+	CHECK(map.is_empty());
+}
+
+TEST_CASE("[OAHashMap] Copy constructor") {
+	uint64_t pre_mem = Memory::get_mem_usage();
+	{
+		OAHashMap<int, int> map0;
+		const uint32_t count = 5;
+		for (uint32_t i = 0; i < count; i++) {
+			map0.insert(i, i);
+		}
+		OAHashMap<int, int> map1(map0);
+		CHECK(map0.get_num_elements() == map1.get_num_elements());
+		CHECK(map0.get_capacity() == map1.get_capacity());
+		CHECK(*map0.lookup_ptr(0) == *map1.lookup_ptr(0));
+	}
+	CHECK(Memory::get_mem_usage() == pre_mem);
+}
+
+TEST_CASE("[OAHashMap] Operator =") {
+	uint64_t pre_mem = Memory::get_mem_usage();
+	{
+		OAHashMap<int, int> map0;
+		OAHashMap<int, int> map1;
+		const uint32_t count = 5;
+		map1.insert(1234, 1234);
+		for (uint32_t i = 0; i < count; i++) {
+			map0.insert(i, i);
+		}
+		map1 = map0;
+		CHECK(map0.get_num_elements() == map1.get_num_elements());
+		CHECK(map0.get_capacity() == map1.get_capacity());
+		CHECK(*map0.lookup_ptr(0) == *map1.lookup_ptr(0));
+	}
+	CHECK(Memory::get_mem_usage() == pre_mem);
+}
+
+TEST_CASE("[OAHashMap] Non-trivial types") {
+	uint64_t pre_mem = Memory::get_mem_usage();
+	{
+		OAHashMap<String, Ref<Texture2D>> map1;
+		const uint32_t count = 10;
+		for (uint32_t i = 0; i < count; i++) {
+			String string = "qwerty";
+			string += itos(i);
+			Ref<Texture2D> ref_texture_2d;
+
+			map1.set(string, ref_texture_2d);
+			Ref<Texture2D> map_vec = *map1.lookup_ptr(string);
+			CHECK(map_vec == ref_texture_2d);
+		}
+		OAHashMap<String, Ref<Texture2D>> map1copy(map1);
+		CHECK(map1copy.has(String("qwerty0")));
+		map1copy = map1;
+		CHECK(map1copy.has(String("qwerty2")));
+
+		OAHashMap<int64_t, Vector4 *> map2;
+
+		for (uint32_t i = 0; i < count; i++) {
+			Vector4 *vec = memnew(Vector4);
+			vec->x = 10;
+			vec->y = 12;
+			vec->z = 151;
+			vec->w = -13;
+			map2.set(i, vec);
+			Vector4 *p = nullptr;
+			map2.lookup(i, p);
+			CHECK(*p == *vec);
+		}
+
+		OAHashMap<int64_t, Vector4 *> map3(map2);
+		for (OAHashMap<int64_t, Vector4 *>::Iterator it = map2.iter(); it.valid; it = map2.next_iter(it)) {
+			memdelete(*(it.value));
+		}
+	}
+	CHECK(Memory::get_mem_usage() == pre_mem);
+}
+
+} // namespace TestOAHashMap
+
+#endif // TEST_OA_HASH_MAP_H
diff --git a/tests/test_main.cpp b/tests/test_main.cpp
index 4a389f4284e7..bb6837c965df 100644
--- a/tests/test_main.cpp
+++ b/tests/test_main.cpp
@@ -86,6 +86,7 @@
 #include "tests/core/templates/test_list.h"
 #include "tests/core/templates/test_local_vector.h"
 #include "tests/core/templates/test_lru.h"
+#include "tests/core/templates/test_oa_hash_map.h"
 #include "tests/core/templates/test_paged_array.h"
 #include "tests/core/templates/test_rid.h"
 #include "tests/core/templates/test_vector.h"