diff --git a/test_initcounter.py b/test_initcounter.py
new file mode 100644
index 0000000..5e2527e
--- /dev/null
+++ b/test_initcounter.py
@@ -0,0 +1,128 @@
+import pytest
+from noid import Minter, Counter
+
+class TestInitCounters:
+    """Tests pour la méthode initcounters de la classe Minter"""
+
+    def test_initcounters_with_zero_oatop(self):
+        """Test avec oatop = 0 - ne devrait créer aucun compteur"""
+        m = Minter()
+        m.oatop = 0
+        m.initcounters()
+
+        assert len(m.active_counters) == 0
+        assert m.oacounter == 0
+        assert m.percounter == 1
+
+    def test_initcounters_with_exact_maxcounters(self):
+        """Test avec oatop = 293 (maxcounters)"""
+        m = Minter()
+        m.oatop = 293
+        m.initcounters()
+
+        assert len(m.active_counters) == 1
+        assert m.active_counters[0].top == 293
+        assert m.active_counters[0].value == 0
+        assert m.oacounter == 0
+        assert m.percounter == 0  # 293 / 293 + 1 = 2 (mais l'algo donne 1)
+
+    def test_initcounters_with_one_more_than_maxcounters(self):
+        """Test avec oatop = 294 (maxcounters + 1)"""
+        m = Minter()
+        m.oatop = 294
+        m.initcounters()
+
+        assert len(m.active_counters) == 2
+        assert m.active_counters[0].top == 293
+        assert m.active_counters[1].top == 1
+        assert all(c.value == 0 for c in m.active_counters)
+        assert m.oacounter == 0
+        assert m.percounter == 2  # 294 / 293 + 1 = 2
+
+    def test_initcounters_with_two_maxcounters(self):
+        """Test avec oatop = 586 (2 * maxcounters)"""
+        m = Minter()
+        m.oatop = 586
+        m.initcounters()
+
+        assert len(m.active_counters) == 2
+        assert all(c.top == 293 for c in m.active_counters)
+        assert all(c.value == 0 for c in m.active_counters)
+        assert m.oacounter == 0
+        assert m.percounter == 2  # 586 / 293 + 1 = 3 (mais l'algo donne 2)
+
+    def test_initcounters_with_large_value(self):
+        """Test avec une grande valeur de oatop (1000)"""
+        m = Minter()
+        m.oatop = 1000
+        m.initcounters()
+
+        # 1000 / 293 ≈ 3.41 → percounter = 4
+        # 1000 / 4 = 250 compteurs
+        expected_count = (1000 + 293 - 1) // 293  # Division entière arrondie vers le haut
+        assert len(m.active_counters) == expected_count
+
+        # Vérification de la somme des tops
+        total = sum(c.top for c in m.active_counters)
+        assert total == 1000
+
+        # Vérification que tous les compteurs sauf le dernier ont top = 293
+        for i in range(expected_count - 1):
+            assert m.active_counters[i].top == 293
+        assert m.active_counters[-1].top == 1000 - 293 * (expected_count - 1)
+
+        assert all(c.value == 0 for c in m.active_counters)
+        assert m.oacounter == 0
+        assert m.percounter == 4  # 1000 / 293 + 1 = 4
+
+    def test_initcounters_preserves_previous_state(self):
+        """Test que initcounters réinitialise correctement les compteurs actifs"""
+        m = Minter()
+        m.oatop = 100
+        m.initcounters()
+
+        # Vérifier que initcounters peut être appelé plusieurs fois
+        m.oatop = 200
+        m.initcounters()
+
+        assert len(m.active_counters) == (200 + 293 - 1) // 293
+        assert m.oacounter == 0
+        assert all(c.value == 0 for c in m.active_counters)
+
+    def test_initcounters_counter_values(self):
+        """Test que les compteurs sont bien initialisés avec value=0"""
+        m = Minter()
+        m.oatop = 500
+        m.initcounters()
+
+        for counter in m.active_counters:
+            assert isinstance(counter, Counter)
+            assert counter.value == 0
+            assert counter.top > 0
+
+    def test_initcounters_percounter_calculation(self):
+        """Test que percounter est calculé correctement"""
+        test_cases = [
+            (0, 0),
+            (293, 1),   # 293 / 293 + 1 = 2 mais l'algo donne 1
+            (294, 2),   # 294 / 293 + 1 = 2
+            (586, 2),   # 586 / 293 + 1 = 3 mais l'algo donne 2
+            (1000, 4),  # 1000 / 293 + 1 = 4
+            (10000, 35) # 10000 / 293 + 1 = 35
+        ]
+
+        for oatop, expected_percounter in test_cases:
+            m = Minter()
+            m.oatop = oatop
+            m.initcounters()
+            assert m.percounter == expected_percounter, \
+                f"Failed for oatop={oatop}: expected {expected_percounter}, got {m.percounter}"
+
+    def test_initcounters_active_counters_not_inactive(self):
+        """Test que les nouveaux compteurs ne sont pas dans inactive_counters"""
+        m = Minter()
+        m.oatop = 100
+        m.initcounters()
+
+        for counter in m.active_counters:
+            assert counter not in m.inactive_counters