diff --git a/systems/scoreboard/scoreboard.gd b/systems/scoreboard/scoreboard.gd
index 718d414..138ca4c 100644
--- a/systems/scoreboard/scoreboard.gd
+++ b/systems/scoreboard/scoreboard.gd
@@ -1,14 +1,28 @@
-class_name Scoreboard extends Node
+# This file is part of open-fpsz.
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+class_name Scoreboard extends Node2D
 
 # define the properties
-@export var num_teams: int = 1
-@export var num_players_per_team: int = 1
+@export var _num_teams: int = 1
+@export var _num_players_per_team: int = 1
 
 # define the scoreboard dictionary
 var scoreboard := {}
 
 # initialize the scoreboard
-func _init() -> void:
+func _init(num_teams: int = _num_teams, num_players_per_team: int = _num_players_per_team) -> void:
 	scoreboard = {}
 	for team in range(1, num_teams + 1):
 		scoreboard[team] = {}
diff --git a/tests/test_systems_scoreboard.gd b/tests/test_systems_scoreboard.gd
new file mode 100644
index 0000000..69733af
--- /dev/null
+++ b/tests/test_systems_scoreboard.gd
@@ -0,0 +1,60 @@
+# This file is part of open-fpsz.
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+extends GutTest
+
+var scoreboard : Scoreboard
+
+func before_all():
+	# test init with params
+	scoreboard = Scoreboard.new(1,2)
+	# check if `num_teams` is correctly initialized
+	assert_true(scoreboard.scoreboard.size() == 1)
+	# check if `num_players_per_team` is correctly initialized
+	assert_true(scoreboard.scoreboard[1].size() == 2)
+	scoreboard.queue_free()
+	
+	# test default init
+	scoreboard = Scoreboard.new()
+	# check if `num_teams` is correctly initialized
+	assert_true(scoreboard.scoreboard.size() == 1)
+	# check if `num_players_per_team` is correctly initialized
+	assert_true(scoreboard.scoreboard[1].size() == 1)
+
+func test_update_score():
+	# update offense score for team 1, player 1 by 5 points
+	scoreboard.update_score(1, 1, 5, 'O')
+	# check player score
+	var player_score = scoreboard.get_player_score(1, 1)
+	assert_true(player_score['O'] == 5)
+
+func test_get_player_score():
+	# update offense score for team 1, player 1 by 5 points
+	scoreboard.update_score(1, 1, 5, 'O')
+	var player_score = scoreboard.get_player_score(1, 1)
+	# check player score
+	assert_true(player_score['O'] == 10)
+
+func test_get_team_score():
+	# update offense score for team 1, player 1 by 5 points
+	scoreboard.update_score(1, 1, 5, 'O')
+	# update defense score for team 1, player 1 by 5 points
+	scoreboard.update_score(1, 1, 5, 'D')
+	var team_score = scoreboard.get_team_score(1)
+	# check team score
+	assert_true(team_score['O'] == 15)
+	assert_true(team_score['D'] == 5)
+
+func after_all():
+	scoreboard.queue_free()