diff --git a/packages/core/tests/fixture.ts b/packages/core/tests/fixture.ts
index ab361a3..b54573d 100644
--- a/packages/core/tests/fixture.ts
+++ b/packages/core/tests/fixture.ts
@@ -76,6 +76,11 @@ export function getFixture(fixtureName: string): {
           {
             root: fixtureRoot,
             logLevel: "warn",
+            vite: {
+              server: {
+                ws: false,
+              },
+            },
           },
           params?.config ?? {},
         ),
diff --git a/packages/hono/tests/fixture.ts b/packages/hono/tests/fixture.ts
index 03149b6..2ebbae3 100644
--- a/packages/hono/tests/fixture.ts
+++ b/packages/hono/tests/fixture.ts
@@ -94,7 +94,15 @@ export function getFixture(fixtureName: string): {
       const middleware = devMiddleware({
         ...params,
         config: mergeConfig<AstroInlineConfig>(
-          { root: fixtureRoot, logLevel: "warn" },
+          {
+            root: fixtureRoot,
+            logLevel: "warn",
+            vite: {
+              server: {
+                ws: false,
+              },
+            },
+          },
           params?.config ?? {},
         ),
       });