Fix RNTester tests

Reviewed By: fkgozali

Differential Revision: D5881825

fbshipit-source-id: 38debe598830c4cc969b5251cfdfd8941ac36e9d

RNTester/RNTesterIntegrationTests/RNTesterSnapshotTests.m

@@ -25,7 +25,9 @@
 - (void)setUp
 {
   _runner = RCTInitRunnerForApp(@"RNTester/js/RNTesterApp.ios", nil);
-  if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 10) {
+  if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 11) {
+    _runner.testSuffix = @"-iOS11";
+  } else if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 10) {
     _runner.testSuffix = @"-iOS10";
   }
   _runner.recordMode = NO;