diff --git a/GoogleSignIn/Sources/GIDAuthStateMigration/Fake/GIDFakeAuthStateMigration.h b/GoogleSignIn/Sources/GIDAuthStateMigration/Fake/GIDFakeAuthStateMigration.h
index fc611e53..24555f30 100644
--- a/GoogleSignIn/Sources/GIDAuthStateMigration/Fake/GIDFakeAuthStateMigration.h
+++ b/GoogleSignIn/Sources/GIDAuthStateMigration/Fake/GIDFakeAuthStateMigration.h
@@ -21,7 +21,6 @@
 
 /// Callback that is called when `migrateIfNeededWithTokenURL` is invoked.
 @property (nonatomic, nullable) void (^migrationInvokedCallback)
-  (NSURL * _Nullable tokenURL, NSString * _Nullable callbackPath, NSString * _Nullable keychainName,
-   BOOL isFreshInstall);
+  (NSURL * _Nullable tokenURL, NSString * _Nullable callbackPath, BOOL isFreshInstall);
 
 @end
diff --git a/GoogleSignIn/Sources/GIDAuthStateMigration/Fake/GIDFakeAuthStateMigration.m b/GoogleSignIn/Sources/GIDAuthStateMigration/Fake/GIDFakeAuthStateMigration.m
index 0346dba1..b753b814 100644
--- a/GoogleSignIn/Sources/GIDAuthStateMigration/Fake/GIDFakeAuthStateMigration.m
+++ b/GoogleSignIn/Sources/GIDAuthStateMigration/Fake/GIDFakeAuthStateMigration.m
@@ -29,10 +29,9 @@ - (instancetype)initWithKeychainStore:(GTMKeychainStore *)keychainStore {
 
 - (void)migrateIfNeededWithTokenURL:(NSURL *)tokenURL
                        callbackPath:(NSString *)callbackPath
-                       keychainName:(NSString *)keychainName
                      isFreshInstall:(BOOL)isFreshInstall {
   if (_migrationInvokedCallback) {
-    _migrationInvokedCallback(tokenURL, callbackPath, keychainName, isFreshInstall);
+    _migrationInvokedCallback(tokenURL, callbackPath, isFreshInstall);
   }
   return;
 }
diff --git a/GoogleSignIn/Sources/GIDAuthStateMigration/GIDAuthStateMigration.h b/GoogleSignIn/Sources/GIDAuthStateMigration/GIDAuthStateMigration.h
index 738368fc..3f246b77 100644
--- a/GoogleSignIn/Sources/GIDAuthStateMigration/GIDAuthStateMigration.h
+++ b/GoogleSignIn/Sources/GIDAuthStateMigration/GIDAuthStateMigration.h
@@ -30,7 +30,6 @@ NS_ASSUME_NONNULL_BEGIN
 /// Perform necessary migrations from legacy auth state storage to most recent GTMAppAuth version.
 - (void)migrateIfNeededWithTokenURL:(NSURL *)tokenURL
                        callbackPath:(NSString *)callbackPath
-                       keychainName:(NSString *)keychainName
                      isFreshInstall:(BOOL)isFreshInstall;
 
 @end
diff --git a/GoogleSignIn/Sources/GIDAuthStateMigration/Implementation/GIDAuthStateMigration.m b/GoogleSignIn/Sources/GIDAuthStateMigration/Implementation/GIDAuthStateMigration.m
index b5c21773..e9c1c107 100644
--- a/GoogleSignIn/Sources/GIDAuthStateMigration/Implementation/GIDAuthStateMigration.m
+++ b/GoogleSignIn/Sources/GIDAuthStateMigration/Implementation/GIDAuthStateMigration.m
@@ -64,7 +64,6 @@ - (instancetype)init {
 
 - (void)migrateIfNeededWithTokenURL:(NSURL *)tokenURL
                        callbackPath:(NSString *)callbackPath
-                       keychainName:(NSString *)keychainName
                      isFreshInstall:(BOOL)isFreshInstall {
   // If this is a fresh install, take no action and mark the migration checks as having been
   // performed.
@@ -82,8 +81,7 @@ - (void)migrateIfNeededWithTokenURL:(NSURL *)tokenURL
   [self performDataProtectedMigrationIfNeeded];
 #elif TARGET_OS_IOS && !TARGET_OS_MACCATALYST
   [self performGIDMigrationIfNeededWithTokenURL:tokenURL
-                                   callbackPath:callbackPath
-                                   keychainName:keychainName];
+                                   callbackPath:callbackPath];
 #endif // TARGET_OS_OSX
 }
 
@@ -117,8 +115,7 @@ - (void)performDataProtectedMigrationIfNeeded {
 // Migrate from GPPSignIn 1.x or GIDSignIn 1.0 - 4.x to the GTMAppAuth storage introduced in
 // GIDSignIn 5.0.
 - (void)performGIDMigrationIfNeededWithTokenURL:(NSURL *)tokenURL
-                                   callbackPath:(NSString *)callbackPath
-                                   keychainName:(NSString *)keychainName {
+                                   callbackPath:(NSString *)callbackPath {
   // See if we've performed the migration check previously.
   NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
   if ([defaults boolForKey:kGTMAppAuthMigrationCheckPerformedKey]) {
diff --git a/GoogleSignIn/Sources/GIDSignIn.m b/GoogleSignIn/Sources/GIDSignIn.m
index ef7ac3eb..48b6d749 100644
--- a/GoogleSignIn/Sources/GIDSignIn.m
+++ b/GoogleSignIn/Sources/GIDSignIn.m
@@ -568,7 +568,6 @@ - (instancetype)initWithKeychainStore:(GTMKeychainStore *)keychainStore
     // Perform migration of auth state from old versions of the SDK if needed.
     [authStateMigrationService migrateIfNeededWithTokenURL:_appAuthConfiguration.tokenEndpoint
                                               callbackPath:kBrowserCallbackPath
-                                              keychainName:kGTMAppAuthKeychainName
                                             isFreshInstall:isFreshInstall];
   }
   return self;
diff --git a/GoogleSignIn/Tests/Unit/GIDAuthStateMigrationTest.m b/GoogleSignIn/Tests/Unit/GIDAuthStateMigrationTest.m
index 20b16451..1504224a 100644
--- a/GoogleSignIn/Tests/Unit/GIDAuthStateMigrationTest.m
+++ b/GoogleSignIn/Tests/Unit/GIDAuthStateMigrationTest.m
@@ -154,7 +154,6 @@ - (void)testMigrateIfNeeded_NoPreviousMigration_DataProtectedMigration {
       [[GIDAuthStateMigration alloc] initWithKeychainStore:_mockGTMKeychainStore];
   [migration migrateIfNeededWithTokenURL:[NSURL URLWithString:kTokenURL]
                             callbackPath:kCallbackPath
-                            keychainName:kKeychainName
                           isFreshInstall:NO];
 
   // verify that the auth session was removed during migration
@@ -179,7 +178,6 @@ - (void)testMigrateIfNeeded_KeychainFailure_DataProtectedMigration {
       [[GIDAuthStateMigration alloc] initWithKeychainStore:_mockGTMKeychainStore];
   [migration migrateIfNeededWithTokenURL:[NSURL URLWithString:kTokenURL]
                             callbackPath:kCallbackPath
-                            keychainName:kKeychainName
                           isFreshInstall:NO];
   XCTAssertNil([_realLegacyGTMKeychainStore retrieveAuthSessionWithError:nil]);
 }
@@ -198,7 +196,6 @@ - (void)testMigrateIfNeeded_NoPreviousMigration_GTMAppAuthMigration {
       [[GIDAuthStateMigration alloc] initWithKeychainStore:_mockGTMKeychainStore];
   [migration migrateIfNeededWithTokenURL:[NSURL URLWithString:kTokenURL]
                             callbackPath:kCallbackPath
-                            keychainName:kKeychainName
                           isFreshInstall:NO];
 }
 
@@ -215,7 +212,6 @@ - (void)testMigrateIfNeeded_KeychainFailure_GTMAppAuthMigration {
       [[GIDAuthStateMigration alloc] initWithKeychainStore:_mockGTMKeychainStore];
   [migration migrateIfNeededWithTokenURL:[NSURL URLWithString:kTokenURL]
                             callbackPath:kCallbackPath
-                            keychainName:kKeychainName
                           isFreshInstall:NO];
 }
 
@@ -258,7 +254,6 @@ - (void)testMigrateIfNeeded_HasPreviousMigration {
       [[GIDAuthStateMigration alloc] initWithKeychainStore:_mockGTMKeychainStore];
   [migration migrateIfNeededWithTokenURL:[NSURL URLWithString:kTokenURL]
                             callbackPath:kCallbackPath
-                            keychainName:kKeychainName
                           isFreshInstall:NO];
 }
 
@@ -274,7 +269,6 @@ - (void)testMigrateIfNeeded_isFreshInstall {
       [[GIDAuthStateMigration alloc] initWithKeychainStore:_mockGTMKeychainStore];
   [migration migrateIfNeededWithTokenURL:[NSURL URLWithString:kTokenURL]
                             callbackPath:kCallbackPath
-                            keychainName:kKeychainName
                           isFreshInstall:YES];
 }
 
diff --git a/GoogleSignIn/Tests/Unit/GIDSignInTest.m b/GoogleSignIn/Tests/Unit/GIDSignInTest.m
index eb367322..71974e0f 100644
--- a/GoogleSignIn/Tests/Unit/GIDSignInTest.m
+++ b/GoogleSignIn/Tests/Unit/GIDSignInTest.m
@@ -498,16 +498,14 @@ - (void)testInitWithKeychainStore_invalidConfig {
 }
 
 - (void)testInitWithKeychainStore_attemptsMigration {
-  NSString *expectedKeychainName = @"foo";
-
   XCTestExpectation *expectation = [self expectationWithDescription:@"Callback should be called."];
   _authStateMigrationService.migrationInvokedCallback =
-    ^(NSURL *tokenURL, NSString *callbackPath, NSString *keychainName, BOOL isFreshInstall) {
+    ^(NSURL *tokenURL, NSString *callbackPath, BOOL isFreshInstall) {
       XCTAssertFalse(isFreshInstall);
       [expectation fulfill];
     };
 
-  GTMKeychainStore *store = [[GTMKeychainStore alloc] initWithItemName:expectedKeychainName];
+  GTMKeychainStore *store = [[GTMKeychainStore alloc] initWithItemName:kKeychainName];
   GIDSignIn *signIn = [[GIDSignIn alloc] initWithKeychainStore:store
                                      authStateMigrationService:_authStateMigrationService];