diff --git a/sources/utils/minigame_resources/log_resource.gd b/sources/utils/minigame_resources/log_resource.gd
index 7323c8dc..38bc8e01 100644
--- a/sources/utils/minigame_resources/log_resource.gd
+++ b/sources/utils/minigame_resources/log_resource.gd
@@ -1,7 +1,7 @@
 class_name LogResource
 extends Resource
 
-@export var logs: Dictionary = {} # int: Dictionary {String: Dictionary}
+@export var logs: Dictionary[int, Dictionary] = {} # First key is lesson number, second key is time
 
 
 func add_log(lesson_nb: int, new_log: Dictionary, time: String) -> void:
diff --git a/tests/unit_tests/test_log_resource.gd b/tests/unit_tests/test_log_resource.gd
new file mode 100644
index 00000000..e22a8cfb
--- /dev/null
+++ b/tests/unit_tests/test_log_resource.gd
@@ -0,0 +1,26 @@
+extends GutTest
+
+
+func test_add_log_creates_bucket_and_stores_entry() -> void:
+	var resource: LogResource = LogResource.new()
+	var payload: Dictionary = {"score": 10}
+	resource.add_log(1, payload, "2024-01-01T00:00:00")
+	assert_true(resource.logs.has(1))
+	assert_true(resource.logs[1].has("2024-01-01T00:00:00"))
+	assert_eq_deep(resource.logs[1]["2024-01-01T00:00:00"] as Dictionary, payload)
+
+
+func test_add_log_duplicate_time_creates_incremented_key() -> void:
+	var resource: LogResource = LogResource.new()
+	resource.add_log(2, {"value": 1}, "2024-02-02T12:00:00")
+	resource.add_log(2, {"value": 2}, "2024-02-02T12:00:00")
+	resource.add_log(2, {"value": 3}, "2024-02-02T12:00:00")
+
+	var lesson_logs: Dictionary = resource.logs[2]
+	assert_true(lesson_logs.has("2024-02-02T12:00:00"))
+	assert_true(lesson_logs.has("2024-02-02T12:00:00_2"))
+	assert_true(lesson_logs.has("2024-02-02T12:00:00_3"))
+	assert_eq_deep(lesson_logs["2024-02-02T12:00:00"] as Dictionary, {"value": 1})
+	assert_eq_deep(lesson_logs["2024-02-02T12:00:00_2"] as Dictionary, {"value": 2})
+	assert_eq_deep(lesson_logs["2024-02-02T12:00:00_3"] as Dictionary, {"value": 3})
+	assert_engine_error(2, "2 warnings are expected here, 1 for each log duplicate")
diff --git a/tests/unit_tests/test_log_resource.gd.uid b/tests/unit_tests/test_log_resource.gd.uid
new file mode 100644
index 00000000..ad61d56d
--- /dev/null
+++ b/tests/unit_tests/test_log_resource.gd.uid
@@ -0,0 +1 @@
+uid://dn66mnnx7s61c