diff --git a/packages/amplify-appsync-simulator/src/utils/auth-helpers/helpers.ts b/packages/amplify-appsync-simulator/src/utils/auth-helpers/helpers.ts
index 5f37fcebc6c..9dfa0eba3ac 100644
--- a/packages/amplify-appsync-simulator/src/utils/auth-helpers/helpers.ts
+++ b/packages/amplify-appsync-simulator/src/utils/auth-helpers/helpers.ts
@@ -28,7 +28,11 @@ export function extractJwtToken(authorization: string): JWTToken {
 export function isValidOIDCToken(token: JWTToken, configuredAuthTypes: AmplifyAppSyncAuthenticationProviderConfig[]): boolean {
   const oidcIssuers = configuredAuthTypes
     .filter(authType => authType.authenticationType === AmplifyAppSyncSimulatorAuthenticationType.OPENID_CONNECT)
-    .map((auth: AmplifyAppSyncAuthenticationProviderOIDCConfig) => auth.openIDConnectConfig.Issuer);
+    .map((auth: AmplifyAppSyncAuthenticationProviderOIDCConfig) =>
+      auth.openIDConnectConfig.Issuer && auth.openIDConnectConfig.Issuer.endsWith('/')
+        ? auth.openIDConnectConfig.Issuer.substring(0, auth.openIDConnectConfig.Issuer.length - 1)
+        : auth.openIDConnectConfig.Issuer,
+    );
 
   return oidcIssuers.length > 0 && oidcIssuers.includes(token.iss);
 }