diff --git a/tests/test_config_file.h b/tests/test_config_file.h
new file mode 100644
index 0000000000..6d163a095e
--- /dev/null
+++ b/tests/test_config_file.h
@@ -0,0 +1,157 @@
+/*************************************************************************/
+/*  test_config_file.h                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 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_CONFIG_FILE_H
+#define TEST_CONFIG_FILE_H
+
+#include "core/io/config_file.h"
+
+#include "tests/test_macros.h"
+
+namespace TestConfigFile {
+
+TEST_CASE("[ConfigFile] Parsing well-formatted files") {
+	ConfigFile config_file;
+	// Formatting is intentionally hand-edited to see how human-friendly the parser is.
+	const Error error = config_file.parse(R"(
+[player]
+
+name = "Unnamed Player"
+tagline="Waiting
+for
+Godot"
+
+color =Color(   0, 0.5,1, 1) ; Inline comment
+position= Vector2(
+	3,
+	4
+)
+
+[graphics]
+
+antialiasing = true
+
+; Testing comments and case-sensitivity...
+antiAliasing = false
+)");
+
+	CHECK_MESSAGE(error == OK, "The configuration file should parse successfully.");
+	CHECK_MESSAGE(
+			String(config_file.get_value("player", "name")) == "Unnamed Player",
+			"Reading `player/name` should return the expected value.");
+	CHECK_MESSAGE(
+			String(config_file.get_value("player", "tagline")) == "Waiting\nfor\nGodot",
+			"Reading `player/tagline` should return the expected value.");
+	CHECK_MESSAGE(
+			Color(config_file.get_value("player", "color")).is_equal_approx(Color(0, 0.5, 1)),
+			"Reading `player/color` should return the expected value.");
+	CHECK_MESSAGE(
+			Vector2(config_file.get_value("player", "position")).is_equal_approx(Vector2(3, 4)),
+			"Reading `player/position` should return the expected value.");
+	CHECK_MESSAGE(
+			bool(config_file.get_value("graphics", "antialiasing")),
+			"Reading `graphics/antialiasing` should return `true`.");
+	CHECK_MESSAGE(
+			bool(config_file.get_value("graphics", "antiAliasing")) == false,
+			"Reading `graphics/antiAliasing` should return `false`.");
+
+	// An empty ConfigFile is valid.
+	const Error error_empty = config_file.parse("");
+	CHECK_MESSAGE(error_empty == OK,
+			"An empty configuration file should parse successfully.");
+}
+
+TEST_CASE("[ConfigFile] Parsing malformatted file") {
+	ConfigFile config_file;
+	ERR_PRINT_OFF;
+	const Error error = config_file.parse(R"(
+[player]
+
+name = "Unnamed Player"" ; Extraneous closing quote.
+tagline = "Waiting\nfor\nGodot"
+
+color = Color(0, 0.5, 1) ; Missing 4th parameter.
+position = Vector2(
+	3,,
+	4
+) ; Extraneous comma.
+
+[graphics]
+
+antialiasing = true
+antialiasing = false ; Duplicate key.
+)");
+	ERR_PRINT_ON;
+
+	CHECK_MESSAGE(error == ERR_PARSE_ERROR,
+			"The configuration file shouldn't parse successfully.");
+}
+
+TEST_CASE("[ConfigFile] Saving file") {
+	ConfigFile config_file;
+	config_file.set_value("player", "name", "Unnamed Player");
+	config_file.set_value("player", "tagline", "Waiting\nfor\nGodot");
+	config_file.set_value("player", "color", Color(0, 0.5, 1));
+	config_file.set_value("player", "position", Vector2(3, 4));
+	config_file.set_value("graphics", "antialiasing", true);
+	config_file.set_value("graphics", "antiAliasing", false);
+
+#ifdef WINDOWS_ENABLED
+	const String config_path = OS::get_singleton()->get_environment("TEMP").plus_file("config.ini");
+#else
+	const String config_path = "/tmp/config.ini";
+#endif
+
+	config_file.save(config_path);
+
+	// Expected contents of the saved ConfigFile.
+	const String contents = R"([player]
+
+name="Unnamed Player"
+tagline="Waiting
+for
+Godot"
+color=Color( 0, 0.5, 1, 1 )
+position=Vector2( 3, 4 )
+
+[graphics]
+
+antialiasing=true
+antiAliasing=false
+)";
+
+	FileAccessRef file = FileAccess::open(config_path, FileAccess::READ);
+	CHECK_MESSAGE(file->get_as_utf8_string() == contents,
+			"The saved configuration file should match the expected format.");
+}
+
+} // namespace TestConfigFile
+
+#endif // TEST_CONFIG_FILE_H
diff --git a/tests/test_main.cpp b/tests/test_main.cpp
index 5c1de88b3e..cd7f1d3eac 100644
--- a/tests/test_main.cpp
+++ b/tests/test_main.cpp
@@ -37,6 +37,7 @@
 #include "test_class_db.h"
 #include "test_color.h"
 #include "test_command_queue.h"
+#include "test_config_file.h"
 #include "test_curve.h"
 #include "test_expression.h"
 #include "test_gradient.h"