diff --git a/src/Core/Constants.cs b/src/Core/Constants.cs
index 4458827804..5f1a654668 100644
--- a/src/Core/Constants.cs
+++ b/src/Core/Constants.cs
@@ -104,7 +104,6 @@ public static class FeatureFlagKeys
     public const string BrowserFilelessImport = "browser-fileless-import";
     public const string ReturnErrorOnExistingKeypair = "return-error-on-existing-keypair";
     public const string UseTreeWalkerApiForPageDetailsCollection = "use-tree-walker-api-for-page-details-collection";
-    public const string FlexibleCollectionsV1 = "flexible-collections-v-1"; // v-1 is intentional
     public const string ItemShare = "item-share";
     public const string KeyRotationImprovements = "key-rotation-improvements";
     public const string DuoRedirect = "duo-redirect";
@@ -151,7 +150,6 @@ public static class FeatureFlagKeys
         return new Dictionary<string, string>()
         {
             { DuoRedirect, "true" },
-            { FlexibleCollectionsV1, "true" },
             { BulkDeviceApproval, "true" }
         };
     }
diff --git a/test/Api.Test/AdminConsole/Controllers/GroupsControllerPutTests.cs b/test/Api.Test/AdminConsole/Controllers/GroupsControllerPutTests.cs
index 3a8e4831af..bc5bbfd325 100644
--- a/test/Api.Test/AdminConsole/Controllers/GroupsControllerPutTests.cs
+++ b/test/Api.Test/AdminConsole/Controllers/GroupsControllerPutTests.cs
@@ -3,7 +3,6 @@ using Bit.Api.AdminConsole.Controllers;
 using Bit.Api.AdminConsole.Models.Request;
 using Bit.Api.Models.Request;
 using Bit.Api.Vault.AuthorizationHandlers.Collections;
-using Bit.Core;
 using Bit.Core.AdminConsole.Entities;
 using Bit.Core.AdminConsole.OrganizationFeatures.Groups.Interfaces;
 using Bit.Core.AdminConsole.Repositories;
@@ -284,9 +283,6 @@ public class GroupsControllerPutTests
         bool adminAccess, Group group, OrganizationUser? savingUser, List<CollectionAccessSelection> currentCollectionAccess,
         List<Guid> currentGroupUsers)
     {
-        // FCv1 is now fully enabled
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
-
         var orgId = organization.Id = group.OrganizationId;
 
         // Arrange org and orgAbility
diff --git a/test/Api.Test/AdminConsole/Controllers/OrganizationUserControllerPutTests.cs b/test/Api.Test/AdminConsole/Controllers/OrganizationUserControllerPutTests.cs
index 0b9c18c570..542a76090c 100644
--- a/test/Api.Test/AdminConsole/Controllers/OrganizationUserControllerPutTests.cs
+++ b/test/Api.Test/AdminConsole/Controllers/OrganizationUserControllerPutTests.cs
@@ -3,7 +3,6 @@ using Bit.Api.AdminConsole.Controllers;
 using Bit.Api.AdminConsole.Models.Request.Organizations;
 using Bit.Api.Models.Request;
 using Bit.Api.Vault.AuthorizationHandlers.Collections;
-using Bit.Core;
 using Bit.Core.AdminConsole.OrganizationFeatures.OrganizationUsers.Interfaces;
 using Bit.Core.Context;
 using Bit.Core.Entities;
@@ -258,9 +257,6 @@ public class OrganizationUserControllerPutTests
         OrganizationAbility organizationAbility, OrganizationUser organizationUser, Guid savingUserId,
         List<CollectionAccessSelection> currentCollectionAccess)
     {
-        // FCv1 is now fully enabled
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
-
         var orgId = organizationAbility.Id = organizationUser.OrganizationId;
 
         sutProvider.GetDependency<ICurrentContext>().ManageUsers(orgId).Returns(true);
diff --git a/test/Api.Test/AdminConsole/Controllers/OrganizationUsersControllerTests.cs b/test/Api.Test/AdminConsole/Controllers/OrganizationUsersControllerTests.cs
index deb4c68188..1a97e69999 100644
--- a/test/Api.Test/AdminConsole/Controllers/OrganizationUsersControllerTests.cs
+++ b/test/Api.Test/AdminConsole/Controllers/OrganizationUsersControllerTests.cs
@@ -2,7 +2,6 @@
 using Bit.Api.AdminConsole.Controllers;
 using Bit.Api.AdminConsole.Models.Request.Organizations;
 using Bit.Api.Vault.AuthorizationHandlers.Collections;
-using Bit.Core;
 using Bit.Core.AdminConsole.Entities;
 using Bit.Core.AdminConsole.Enums;
 using Bit.Core.AdminConsole.Models.Data.Organizations.Policies;
@@ -170,7 +169,6 @@ public class OrganizationUsersControllerTests
     public async Task Invite_NotAuthorizedToGiveAccessToCollections_Throws(OrganizationAbility organizationAbility, OrganizationUserInviteRequestModel model,
         Guid userId, SutProvider<OrganizationUsersController> sutProvider)
     {
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
         sutProvider.GetDependency<ICurrentContext>().ManageUsers(organizationAbility.Id).Returns(true);
         sutProvider.GetDependency<IApplicationCacheService>().GetOrganizationAbilityAsync(organizationAbility.Id)
             .Returns(organizationAbility);
diff --git a/test/Api.Test/Vault/AuthorizationHandlers/BulkCollectionAuthorizationHandlerTests.cs b/test/Api.Test/Vault/AuthorizationHandlers/BulkCollectionAuthorizationHandlerTests.cs
index ad3d58b029..b94162be8e 100644
--- a/test/Api.Test/Vault/AuthorizationHandlers/BulkCollectionAuthorizationHandlerTests.cs
+++ b/test/Api.Test/Vault/AuthorizationHandlers/BulkCollectionAuthorizationHandlerTests.cs
@@ -1,6 +1,5 @@
 using System.Security.Claims;
 using Bit.Api.Vault.AuthorizationHandlers.Collections;
-using Bit.Core;
 using Bit.Core.Context;
 using Bit.Core.Entities;
 using Bit.Core.Enums;
@@ -561,7 +560,6 @@ public class BulkCollectionAuthorizationHandlerTests
             sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
             sutProvider.GetDependency<IApplicationCacheService>().GetOrganizationAbilityAsync(organization.Id)
                 .Returns(organizationAbility);
-            sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
 
             var context = new AuthorizationHandlerContext(
                 new[] { op },
@@ -604,7 +602,6 @@ public class BulkCollectionAuthorizationHandlerTests
             sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
             sutProvider.GetDependency<IApplicationCacheService>().GetOrganizationAbilityAsync(organization.Id)
                 .Returns(organizationAbility);
-            sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
 
             var context = new AuthorizationHandlerContext(
                 new[] { op },
@@ -802,8 +799,6 @@ public class BulkCollectionAuthorizationHandlerTests
 
         sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
         sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1)
-            .Returns(true);
         sutProvider.GetDependency<IApplicationCacheService>().GetOrganizationAbilityAsync(organization.Id)
             .Returns(new OrganizationAbility { AllowAdminAccessToAllCollectionItems = true });
 
@@ -830,8 +825,6 @@ public class BulkCollectionAuthorizationHandlerTests
 
         sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
         sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1)
-            .Returns(true);
         sutProvider.GetDependency<IApplicationCacheService>().GetOrganizationAbilityAsync(organization.Id)
             .Returns(new OrganizationAbility { AllowAdminAccessToAllCollectionItems = false });
 
@@ -858,8 +851,6 @@ public class BulkCollectionAuthorizationHandlerTests
 
         sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
         sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1)
-            .Returns(true);
         sutProvider.GetDependency<IApplicationCacheService>().GetOrganizationAbilityAsync(organization.Id)
             .Returns(new OrganizationAbility { AllowAdminAccessToAllCollectionItems = true });
 
@@ -886,8 +877,6 @@ public class BulkCollectionAuthorizationHandlerTests
 
         sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
         sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1)
-            .Returns(true);
         sutProvider.GetDependency<IApplicationCacheService>().GetOrganizationAbilityAsync(organization.Id)
             .Returns(new OrganizationAbility { AllowAdminAccessToAllCollectionItems = false });
 
@@ -1009,7 +998,6 @@ public class BulkCollectionAuthorizationHandlerTests
         sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
         sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
         sutProvider.GetDependency<ICollectionRepository>().GetManyByUserIdAsync(actingUserId).Returns(collections);
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
 
         foreach (var c in collections)
         {
@@ -1045,7 +1033,6 @@ public class BulkCollectionAuthorizationHandlerTests
         sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
         sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
         sutProvider.GetDependency<ICollectionRepository>().GetManyByUserIdAsync(actingUserId).Returns(collections);
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
 
         foreach (var c in collections)
         {
@@ -1081,7 +1068,6 @@ public class BulkCollectionAuthorizationHandlerTests
         sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
         sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
         sutProvider.GetDependency<ICollectionRepository>().GetManyByUserIdAsync(actingUserId).Returns(collections);
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
         sutProvider.GetDependency<ICurrentContext>().ProviderUserForOrgAsync(Arg.Any<Guid>()).Returns(false);
 
         foreach (var c in collections)
@@ -1115,7 +1101,6 @@ public class BulkCollectionAuthorizationHandlerTests
         sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
         sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
         sutProvider.GetDependency<ICollectionRepository>().GetManyByUserIdAsync(actingUserId).Returns(collections);
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
         sutProvider.GetDependency<ICurrentContext>().ProviderUserForOrgAsync(Arg.Any<Guid>()).Returns(false);
 
         foreach (var c in collections)
@@ -1149,7 +1134,6 @@ public class BulkCollectionAuthorizationHandlerTests
         sutProvider.GetDependency<ICurrentContext>().UserId.Returns(actingUserId);
         sutProvider.GetDependency<ICurrentContext>().GetOrganization(organization.Id).Returns(organization);
         sutProvider.GetDependency<ICollectionRepository>().GetManyByUserIdAsync(actingUserId).Returns(collections);
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
         sutProvider.GetDependency<ICurrentContext>().ProviderUserForOrgAsync(Arg.Any<Guid>()).Returns(false);
 
         foreach (var c in collections)
diff --git a/test/Api.Test/Vault/Controllers/CiphersControllerTests.cs b/test/Api.Test/Vault/Controllers/CiphersControllerTests.cs
index 8c92984ffc..e7c5cd9ef5 100644
--- a/test/Api.Test/Vault/Controllers/CiphersControllerTests.cs
+++ b/test/Api.Test/Vault/Controllers/CiphersControllerTests.cs
@@ -170,7 +170,6 @@ public class CiphersControllerTests
             Id = organization.Id,
             AllowAdminAccessToAllCollectionItems = allowAdminsAccessToAllItems
         });
-        sutProvider.GetDependency<IFeatureService>().IsEnabled(FeatureFlagKeys.FlexibleCollectionsV1).Returns(true);
 
         if (shouldSucceed)
         {