diff --git a/components/health_component.gd b/components/health_component.gd
index 26e175b..3fbe9d1 100644
--- a/components/health_component.gd
+++ b/components/health_component.gd
@@ -21,19 +21,19 @@ class_name HealthComponent extends Area3D
 		health_changed.emit(value)
 
 signal health_zeroed
-signal health_changed(value : int)
+signal health_changed(value : float)
 
 func _ready() -> void:
 	heal_full()
 
 @rpc("call_local")
-func damage(amount : int) -> void:
+func damage(amount : float) -> void:
 	health = clampf(health - amount, 0.0, max_health)
 	if health == 0.0:
 		health_zeroed.emit()
 
 @rpc("call_local")
-func _heal(amount : int) -> void:
+func _heal(amount : float) -> void:
 	health = clampf(health + amount, 0.0, max_health)
 
 func heal_full() -> void:
diff --git a/tests/test_basics.gd b/tests/test_basics.gd
index 4faf653..921df60 100644
--- a/tests/test_basics.gd
+++ b/tests/test_basics.gd
@@ -1,21 +1,21 @@
 # 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
 
-func _test_projectile_class():
-	var projectile = Projectile.new()
-	assert(projectile != null, "Projectile class should be instantiated")
-	assert(projectile.speed == 78.4, "Projectile damage should be initialized to 78.4")
-	projectile.queue_free()
+func test_projectile_class() -> void:
+	var projectile : Projectile = Projectile.new()
+	assert_true(projectile != null, "Projectile class should be instantiated")
+	assert_true(projectile.speed == 78.4, "Projectile damage should be initialized to 78.4")
+	projectile.free()
diff --git a/tests/test_health_component.gd b/tests/test_health_component.gd
new file mode 100644
index 0000000..e789e63
--- /dev/null
+++ b/tests/test_health_component.gd
@@ -0,0 +1,53 @@
+# 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 _subject : HealthComponent
+const TEST_MAX_HEALTH : float = 100.0
+
+func before_each() -> void:
+	_subject = HealthComponent.new()
+	watch_signals(_subject)
+	_subject.max_health = TEST_MAX_HEALTH
+	set_multiplayer_authority(multiplayer.get_unique_id())
+	add_child(_subject)
+
+func after_each() -> void:
+	_subject.free()
+
+func test_that_it_has_max_health_when_ready() -> void:
+	assert_eq(_subject.health, _subject.max_health)
+
+func test_that_it_takes_damage() -> void:
+	var damage_amount : float = 10
+	_subject.damage(damage_amount)
+	assert_eq(_subject.health, TEST_MAX_HEALTH - damage_amount)
+
+func test_that_it_emits_health_changed_after_damage() -> void:
+	_subject.damage(1)
+	assert_signal_emitted(_subject, 'health_changed')
+
+func test_that_it_emits_health_zeroed() -> void:
+	_subject.damage(TEST_MAX_HEALTH)
+	assert_signal_emitted(_subject, 'health_zeroed')
+
+func test_that_it_heals_fully() -> void:
+	_subject.health = 10
+	_subject.heal_full()
+	assert_eq(_subject.health, TEST_MAX_HEALTH)
+
+func test_that_it_emits_health_changed_after_heal_full() -> void:
+	_subject.heal_full()
+	assert_signal_emitted(_subject, 'health_changed')