diff --git a/src/runtime/update-component.ts b/src/runtime/update-component.ts
index 922601cb..ea45775f 100644
--- a/src/runtime/update-component.ts
+++ b/src/runtime/update-component.ts
@@ -362,7 +362,7 @@ export const postUpdateComponent = (hostRef: d.HostRef) => {
 };
 
 export const forceUpdate = (ref: any) => {
-  if (BUILD.updatable && Build.isBrowser) {
+  if (BUILD.updatable && (Build.isBrowser || Build.isTesting)) {
     const hostRef = getHostRef(ref);
     const isConnected = hostRef.$hostElement$.isConnected;
     if (
diff --git a/src/testing/platform/testing-build.ts b/src/testing/platform/testing-build.ts
index dcf957b8..bf00e6be 100644
--- a/src/testing/platform/testing-build.ts
+++ b/src/testing/platform/testing-build.ts
@@ -2,7 +2,7 @@ import type * as d from '@rindo/core/internal';
 
 export const Build: d.UserBuildConditionals = {
   isDev: true,
-  isBrowser: true,
-  isServer: false,
+  isBrowser: false,
+  isServer: true,
   isTesting: true,
 };