diff --git a/packages/rn-tester/BUCK b/packages/rn-tester/BUCK
index 01653b0589..3e577b4b78 100644
--- a/packages/rn-tester/BUCK
+++ b/packages/rn-tester/BUCK
@@ -1,3 +1,4 @@
+load("@fbsource//xplat/hermes/defs:hermes.bzl", "HERMES_BYTECODE_VERSION")
 load("//tools/build_defs:fb_native_wrapper.bzl", "fb_native")
 load("//tools/build_defs:fb_xplat_platform_specific_rule.bzl", "fb_xplat_platform_specific_rule")
 load("//tools/build_defs:fb_xplat_resource.bzl", "fb_xplat_resource")
@@ -121,7 +122,9 @@ fb_apple_test(
         "QuartzCore",
         "UIKit",
     ],
-    preprocessor_flags = get_objc_arc_preprocessor_flags() + get_preprocessor_flags_for_build_mode(),
+    preprocessor_flags = get_objc_arc_preprocessor_flags() + [
+        "-DHERMES_BYTECODE_VERSION={}".format(HERMES_BYTECODE_VERSION),
+    ] + get_preprocessor_flags_for_build_mode(),
     visibility = [
         "//fbobjc/Libraries/FBReactKit:workspace",
     ],
diff --git a/packages/rn-tester/RNTesterUnitTests/RCTBundleURLProviderTests.m b/packages/rn-tester/RNTesterUnitTests/RCTBundleURLProviderTests.m
index 309ccaa6a1..9a72c65def 100644
--- a/packages/rn-tester/RNTesterUnitTests/RCTBundleURLProviderTests.m
+++ b/packages/rn-tester/RNTesterUnitTests/RCTBundleURLProviderTests.m
@@ -22,22 +22,42 @@ static NSURL *mainBundleURL()
 
 static NSURL *localhostBundleURL()
 {
+#ifdef HERMES_BYTECODE_VERSION
+  return [NSURL
+      URLWithString:
+          [NSString
+              stringWithFormat:
+                  @"http://localhost:8081/%@.bundle?platform=ios&dev=true&minify=false&modulesOnly=false&runModule=true&runtimeBytecodeVersion=%u&app=com.apple.dt.xctest.tool",
+                  testFile,
+                  HERMES_BYTECODE_VERSION]];
+#else
   return [NSURL
       URLWithString:
           [NSString
               stringWithFormat:
                   @"http://localhost:8081/%@.bundle?platform=ios&dev=true&minify=false&modulesOnly=false&runModule=true&app=com.apple.dt.xctest.tool",
                   testFile]];
+#endif
 }
 
 static NSURL *ipBundleURL()
 {
+#ifdef HERMES_BYTECODE_VERSION
+  return [NSURL
+      URLWithString:
+          [NSString
+              stringWithFormat:
+                  @"http://192.168.1.1:8081/%@.bundle?platform=ios&dev=true&minify=false&modulesOnly=false&runModule=true&runtimeBytecodeVersion=%u&app=com.apple.dt.xctest.tool",
+                  testFile,
+                  HERMES_BYTECODE_VERSION]];
+#else
   return [NSURL
       URLWithString:
           [NSString
               stringWithFormat:
                   @"http://192.168.1.1:8081/%@.bundle?platform=ios&dev=true&minify=false&modulesOnly=false&runModule=true&app=com.apple.dt.xctest.tool",
                   testFile]];
+#endif
 }
 
 @implementation NSBundle (RCTBundleURLProviderTests)
@@ -88,6 +108,8 @@ static NSURL *ipBundleURL()
 
 - (void)testLocalhostURL
 {
+  id classMock = OCMClassMock([RCTBundleURLProvider class]);
+  [[[classMock stub] andReturnValue:@YES] isPackagerRunning:[OCMArg any] scheme:[OCMArg any]];
   RCTBundleURLProvider *settings = [RCTBundleURLProvider sharedSettings];
   settings.jsLocation = @"localhost";
   NSURL *URL = [settings jsBundleURLForBundleRoot:testFile fallbackResource:nil];