diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000000..b44e3b25ce0
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+ab-testing/config/abTests.ts merge=union
diff --git a/ab-testing/config/abTests.ts b/ab-testing/config/abTests.ts
index a0dd40f2cd1..7cbd8663a01 100644
--- a/ab-testing/config/abTests.ts
+++ b/ab-testing/config/abTests.ts
@@ -32,6 +32,18 @@ const ABTests: ABTest[] = [
 		groups: ["control", "variant"],
 		shouldForceMetricsCollection: true,
 	},
+	{
+		name: "commercial-test-test",
+		description: "Testing test merge confict resolution",
+		owners: ["commercial.dev@guardian.co.uk"],
+		status: "ON",
+		expirationDate: "2026-03-10",
+		type: "client",
+		audienceSize: 10 / 100,
+		audienceSpace: "A",
+		groups: ["control", "variant"],
+		shouldForceMetricsCollection: true,
+	},
 	{
 		name: "commercial-user-module-liveramp",
 		description: