diff --git a/RNTester/RCTTest/RCTTestRunner.m b/RNTester/RCTTest/RCTTestRunner.m
index 3e530a5e1..bf2228c0a 100644
--- a/RNTester/RCTTest/RCTTestRunner.m
+++ b/RNTester/RCTTest/RCTTestRunner.m
@@ -87,10 +87,7 @@ RCT_NOT_IMPLEMENTED(- (instancetype)init)
 - (NSURL *)defaultScriptURL
 {
   if (getenv("CI_USE_PACKAGER") || _useBundler) {
-    NSString *bundlePrefix = @"";
-    if (getenv("CI_USE_BUNDLE_PREFIX")) {
-      bundlePrefix = @"react-native-github/";
-    }
+    NSString *bundlePrefix = [[[NSBundle mainBundle] infoDictionary] valueForKey:@"RN_BUNDLE_PREFIX"];
     return [NSURL URLWithString:[NSString stringWithFormat:@"http://localhost:8081/%@%@.bundle?platform=ios&dev=true", bundlePrefix, _appPath]];
   } else {
     return [[NSBundle bundleForClass:[RCTBridge class]] URLForResource:@"main" withExtension:@"jsbundle"];
diff --git a/RNTester/RNTester.xcodeproj/project.pbxproj b/RNTester/RNTester.xcodeproj/project.pbxproj
index f25ba253c..e2288089c 100644
--- a/RNTester/RNTester.xcodeproj/project.pbxproj
+++ b/RNTester/RNTester.xcodeproj/project.pbxproj
@@ -1913,6 +1913,11 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				BUNDLE_CONFIG = "$(SRCROOT)/../metro.config.js";
 				DEVELOPMENT_TEAM = VYK7DLU38Z;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+								"RN_BUNDLE_PREFIX=$(RN_BUNDLE_PREFIX)",
+                "DEBUG=1",
+                "$(inherited)",
+        );
 				HEADER_SEARCH_PATHS = (
 					"$(SRCROOT)/../third-party/boost_1_63_0",
 					"$(SRCROOT)/../third-party/folly-2018.10.22.00",
@@ -1924,6 +1929,7 @@
 				LIBRARY_SEARCH_PATHS = "$(inherited)";
 				PRODUCT_BUNDLE_IDENTIFIER = com.facebook.react.uiapp;
 				PRODUCT_NAME = RNTester;
+				RN_BUNDLE_PREFIX = "";
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -1934,6 +1940,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				BUNDLE_CONFIG = "$(SRCROOT)/../metro.config.js";
 				DEVELOPMENT_TEAM = VYK7DLU38Z;
+				GCC_PREPROCESSOR_DEFINITIONS = "RN_BUNDLE_PREFIX=$(RN_BUNDLE_PREFIX)";
 				HEADER_SEARCH_PATHS = (
 					"$(SRCROOT)/../third-party/boost_1_63_0",
 					"$(SRCROOT)/../third-party/folly-2018.10.22.00",
diff --git a/RNTester/RNTester.xcodeproj/xcshareddata/xcschemes/RNTester.xcscheme b/RNTester/RNTester.xcodeproj/xcshareddata/xcschemes/RNTester.xcscheme
index 4f65fc298..ff2e9c27c 100644
--- a/RNTester/RNTester.xcodeproj/xcshareddata/xcschemes/RNTester.xcscheme
+++ b/RNTester/RNTester.xcodeproj/xcshareddata/xcschemes/RNTester.xcscheme
@@ -144,8 +144,8 @@
             isEnabled = "YES">
          </EnvironmentVariable>
          <EnvironmentVariable
-            key = "CI_USE_BUNDLE_PREFIX"
-            value = "0"
+            key = "RN_BUNDLE_PREFIX"
+            value = ""
             isEnabled = "YES">
          </EnvironmentVariable>
       </EnvironmentVariables>
diff --git a/RNTester/RNTester/AppDelegate.mm b/RNTester/RNTester/AppDelegate.mm
index 4e11db008..17f089a43 100644
--- a/RNTester/RNTester/AppDelegate.mm
+++ b/RNTester/RNTester/AppDelegate.mm
@@ -109,10 +109,7 @@
 
 - (NSURL *)sourceURLForBridge:(__unused RCTBridge *)bridge
 {
-  NSString *bundlePrefix = @"";
-  if (getenv("CI_USE_BUNDLE_PREFIX")) {
-    bundlePrefix = @"react-native-github/";
-  }
+  NSString *bundlePrefix = [[[NSBundle mainBundle] infoDictionary] valueForKey:@"RN_BUNDLE_PREFIX"];
   NSString *bundleRoot = [NSString stringWithFormat:@"%@RNTester/js/RNTesterApp.ios", bundlePrefix];
   return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:bundleRoot
                                                         fallbackResource:nil];
diff --git a/RNTester/RNTester/Info.plist b/RNTester/RNTester/Info.plist
index 13573d49b..3b0806d0b 100644
--- a/RNTester/RNTester/Info.plist
+++ b/RNTester/RNTester/Info.plist
@@ -60,5 +60,7 @@
 	<false/>
 	<key>NSPhotoLibraryUsageDescription</key>
 	<string>You need to add NSPhotoLibraryUsageDescription key in Info.plist to enable photo library usage, otherwise it is going to *fail silently*!</string>
+	<key>RN_BUNDLE_PREFIX</key>
+	<string>$(RN_BUNDLE_PREFIX)</string>
 </dict>
 </plist>
diff --git a/RNTester/RNTesterIntegrationTests/RCTLoggingTests.m b/RNTester/RNTesterIntegrationTests/RCTLoggingTests.m
index 8cc22ef0e..e1ed8b0b8 100644
--- a/RNTester/RNTesterIntegrationTests/RCTLoggingTests.m
+++ b/RNTester/RNTesterIntegrationTests/RCTLoggingTests.m
@@ -30,10 +30,7 @@
 {
   NSURL *scriptURL;
   if (getenv("CI_USE_PACKAGER")) {
-    NSString *bundlePrefix = @"";
-    if (getenv("CI_USE_BUNDLE_PREFIX")) {
-      bundlePrefix = @"react-native-github/";
-    }
+    NSString *bundlePrefix = [[[NSBundle mainBundle] infoDictionary] valueForKey:@"RN_BUNDLE_PREFIX"];
     NSString *app = @"IntegrationTests/IntegrationTestsApp";
     scriptURL = [NSURL URLWithString:[NSString stringWithFormat:@"http://localhost:8081/%@%@.bundle?platform=ios&dev=true", bundlePrefix, app]];
   } else {