diff --git a/tests/core/math/test_plane.h b/tests/core/math/test_plane.h
new file mode 100644
index 00000000000..d81a5af1ce4
--- /dev/null
+++ b/tests/core/math/test_plane.h
@@ -0,0 +1,172 @@
+/*************************************************************************/
+/*  test_plane.h                                                         */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* 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_PLANE_H
+#define TEST_PLANE_H
+
+#include "core/math/plane.h"
+
+#include "thirdparty/doctest/doctest.h"
+
+namespace TestPlane {
+
+// Plane
+
+TEST_CASE("[Plane] Constructor methods") {
+	const Plane plane = Plane(32, 22, 16, 3);
+	const Plane plane_vector = Plane(Vector3(32, 22, 16), 3);
+	const Plane plane_copy_plane = Plane(plane);
+
+	CHECK_MESSAGE(
+			plane == plane_vector,
+			"Planes created with same values but different methods should be equal.");
+
+	CHECK_MESSAGE(
+			plane == plane_copy_plane,
+			"Planes created with same values but different methods should be equal.");
+}
+
+TEST_CASE("[Plane] Basic getters") {
+	const Plane plane = Plane(32, 22, 16, 3);
+	const Plane plane_normalized = Plane(32.0 / 42, 22.0 / 42, 16.0 / 42, 3.0 / 42);
+
+	CHECK_MESSAGE(
+			plane.get_normal().is_equal_approx(Vector3(32, 22, 16)),
+			"get_normal() should return the expected value.");
+
+	CHECK_MESSAGE(
+			plane.normalized().is_equal_approx(plane_normalized),
+			"normalized() should return a copy of the normalized value.");
+}
+
+TEST_CASE("[Plane] Basic setters") {
+	Plane plane = Plane(32, 22, 16, 3);
+	plane.set_normal(Vector3(4, 2, 3));
+
+	CHECK_MESSAGE(
+			plane.is_equal_approx(Plane(4, 2, 3, 3)),
+			"set_normal() should result in the expected plane.");
+
+	plane = Plane(32, 22, 16, 3);
+	plane.normalize();
+
+	CHECK_MESSAGE(
+			plane.is_equal_approx(Plane(32.0 / 42, 22.0 / 42, 16.0 / 42, 3.0 / 42)),
+			"normalize() should result in the expected plane.");
+}
+
+TEST_CASE("[Plane] Plane-point operations") {
+	const Plane plane = Plane(32, 22, 16, 3);
+	const Plane y_facing_plane = Plane(0, 1, 0, 4);
+
+	CHECK_MESSAGE(
+			plane.center().is_equal_approx(Vector3(32 * 3, 22 * 3, 16 * 3)),
+			"center() should return a vector pointing to the center of the plane.");
+
+	CHECK_MESSAGE(
+			y_facing_plane.is_point_over(Vector3(0, 5, 0)),
+			"is_point_over() should return the expected result.");
+
+	CHECK_MESSAGE(
+			y_facing_plane.get_any_perpendicular_normal().is_equal_approx(Vector3(1, 0, 0)),
+			"get_any_perpindicular_normal() should return the expected result.");
+
+	// TODO distance_to()
+}
+
+TEST_CASE("[Plane] Has point") {
+	const Plane x_facing_plane = Plane(1, 0, 0, 0);
+	const Plane y_facing_plane = Plane(0, 1, 0, 0);
+	const Plane z_facing_plane = Plane(0, 0, 1, 0);
+
+	const Vector3 x_axis_point = Vector3(10, 0, 0);
+	const Vector3 y_axis_point = Vector3(0, 10, 0);
+	const Vector3 z_axis_point = Vector3(0, 0, 10);
+
+	const Plane x_facing_plane_with_d_offset = Plane(1, 0, 0, 1);
+	const Vector3 y_axis_point_with_d_offset = Vector3(1, 10, 0);
+
+	CHECK_MESSAGE(
+			x_facing_plane.has_point(y_axis_point),
+			"has_point() with contained Vector3 should return the expected result.");
+	CHECK_MESSAGE(
+			x_facing_plane.has_point(z_axis_point),
+			"has_point() with contained Vector3 should return the expected result.");
+
+	CHECK_MESSAGE(
+			y_facing_plane.has_point(x_axis_point),
+			"has_point() with contained Vector3 should return the expected result.");
+	CHECK_MESSAGE(
+			y_facing_plane.has_point(z_axis_point),
+			"has_point() with contained Vector3 should return the expected result.");
+
+	CHECK_MESSAGE(
+			z_facing_plane.has_point(y_axis_point),
+			"has_point() with contained Vector3 should return the expected result.");
+	CHECK_MESSAGE(
+			z_facing_plane.has_point(x_axis_point),
+			"has_point() with contained Vector3 should return the expected result.");
+
+	CHECK_MESSAGE(
+			x_facing_plane_with_d_offset.has_point(y_axis_point_with_d_offset),
+			"has_point() with passed Vector3 should return the expected result.");
+}
+
+TEST_CASE("[Plane] Intersection") {
+	const Plane x_facing_plane = Plane(1, 0, 0, 1);
+	const Plane y_facing_plane = Plane(0, 1, 0, 2);
+	const Plane z_facing_plane = Plane(0, 0, 1, 3);
+
+	Vector3 vec_out;
+
+	CHECK_MESSAGE(
+			x_facing_plane.intersect_3(y_facing_plane, z_facing_plane, &vec_out),
+			"intersect_3() should return the expected result.");
+	CHECK_MESSAGE(
+			vec_out.is_equal_approx(Vector3(1, 2, 3)),
+			"intersect_3() should modify vec_out to the expected result.");
+
+	CHECK_MESSAGE(
+			x_facing_plane.intersects_ray(Vector3(0, 1, 1), Vector3(2, 0, 0), &vec_out),
+			"intersects_ray() should return the expected result.");
+	CHECK_MESSAGE(
+			vec_out.is_equal_approx(Vector3(1, 1, 1)),
+			"intersects_ray() should modify vec_out to the expected result.");
+
+	CHECK_MESSAGE(
+			x_facing_plane.intersects_segment(Vector3(0, 1, 1), Vector3(2, 1, 1), &vec_out),
+			"intersects_segment() should return the expected result.");
+	CHECK_MESSAGE(
+			vec_out.is_equal_approx(Vector3(1, 1, 1)),
+			"intersects_segment() should modify vec_out to the expected result.");
+}
+} // namespace TestPlane
+
+#endif // TEST_PLANE_H
diff --git a/tests/test_main.cpp b/tests/test_main.cpp
index ac0cdf0cc1b..79cda7e5125 100644
--- a/tests/test_main.cpp
+++ b/tests/test_main.cpp
@@ -45,6 +45,7 @@
 #include "tests/core/math/test_expression.h"
 #include "tests/core/math/test_geometry_2d.h"
 #include "tests/core/math/test_geometry_3d.h"
+#include "tests/core/math/test_plane.h"
 #include "tests/core/math/test_random_number_generator.h"
 #include "tests/core/math/test_rect2.h"
 #include "tests/core/math/test_rect2i.h"