diff --git a/tests/domain/water-material.test.ts b/tests/domain/water-material.test.ts
index 9ea08a0a..77c451eb 100644
--- a/tests/domain/water-material.test.ts
+++ b/tests/domain/water-material.test.ts
@@ -401,13 +401,13 @@ describe("water material helpers", () => {
       kind: "triangleMesh" as const,
       vertices: new Float32Array([
         -3, 0, -2,
-        -0.6, 0, -2,
-        -0.6, 0, 2,
+        -0.08, 0, -2,
+        -0.08, 0, 2,
         -3, 0, 2,
-        0.6, 0, -2,
+        0.08, 0, -2,
         3, 0, -2,
         3, 0, 2,
-        0.6, 0, 2
+        0.08, 0, 2
       ]),
       indices: new Uint32Array([
         0, 1, 2,