diff --git a/src/core/Ab/AbContainerInterface.php b/src/core/Ab/AbContainerInterface.php
new file mode 100644
index 0000000..866b4fc
--- /dev/null
+++ b/src/core/Ab/AbContainerInterface.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Core\Ab;
+
+/**
+ * interface AbContainerInterface.
+ *
+ * @author Simon Vieille <simon@deblan.fr>
+ */
+interface AbContainerInterface
+{
+    public function add(AbTestInterface $test): self;
+
+    public function has(string $name): bool;
+
+    public function get(string $name): AbTestInterface;
+}
diff --git a/src/core/Ab/AbTestInterface.php b/src/core/Ab/AbTestInterface.php
new file mode 100644
index 0000000..051233e
--- /dev/null
+++ b/src/core/Ab/AbTestInterface.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Core\Ab;
+
+/**
+ * interface AbTestInterface.
+ *
+ * @author Simon Vieille <simon@deblan.fr>
+ */
+interface AbTestInterface
+{
+    public function getName(): string;
+
+    public function getResult();
+
+    public function setResult(string $result): self;
+
+    public function isValidVariation($variation): bool;
+
+    public function addVariation(string $name, $value, int $probability = null): self;
+
+    public function getVariation($variation);
+
+    public function getResultValue();
+
+    public function setDuration(int $duration): self;
+
+    public function getDuration(): int;
+
+    public function run(): self;
+}