diff --git a/framework/src/Volo.Abp.Authorization/Volo/Abp/Authorization/Permissions/IPermissionDefinitionContext.cs b/framework/src/Volo.Abp.Authorization/Volo/Abp/Authorization/Permissions/IPermissionDefinitionContext.cs
index 11888b47c6..00680e0398 100644
--- a/framework/src/Volo.Abp.Authorization/Volo/Abp/Authorization/Permissions/IPermissionDefinitionContext.cs
+++ b/framework/src/Volo.Abp.Authorization/Volo/Abp/Authorization/Permissions/IPermissionDefinitionContext.cs
@@ -6,6 +6,7 @@ namespace Volo.Abp.Authorization.Permissions
     public interface IPermissionDefinitionContext
     {
         //TODO: Add Get methods to find and modify a permission or group.
+        PermissionGroupDefinition GetGroupOrNull(string name);
 
         PermissionGroupDefinition AddGroup([NotNull] string name, ILocalizableString displayName = null);
     }
diff --git a/framework/src/Volo.Abp.Authorization/Volo/Abp/Authorization/Permissions/PermissionDefinitionContext.cs b/framework/src/Volo.Abp.Authorization/Volo/Abp/Authorization/Permissions/PermissionDefinitionContext.cs
index 68ce925c0d..59be1c2ad5 100644
--- a/framework/src/Volo.Abp.Authorization/Volo/Abp/Authorization/Permissions/PermissionDefinitionContext.cs
+++ b/framework/src/Volo.Abp.Authorization/Volo/Abp/Authorization/Permissions/PermissionDefinitionContext.cs
@@ -23,5 +23,18 @@ namespace Volo.Abp.Authorization.Permissions
 
             return Groups[name] = new PermissionGroupDefinition(name, displayName);
         }
+
+        public virtual PermissionGroupDefinition GetGroupOrNull(string name)
+        {
+            Check.NotNull(name, nameof(name));
+
+            if (!Groups.ContainsKey(name))
+            {
+                return null;
+            }
+
+            return Groups[name];
+        }
+
     }
 }
\ No newline at end of file
diff --git a/framework/test/Volo.Abp.Authorization.Tests/Volo/Abp/Authorization/Authorization_Tests.cs b/framework/test/Volo.Abp.Authorization.Tests/Volo/Abp/Authorization/Authorization_Tests.cs
index dbd42f17ca..7c04a9cf1b 100644
--- a/framework/test/Volo.Abp.Authorization.Tests/Volo/Abp/Authorization/Authorization_Tests.cs
+++ b/framework/test/Volo.Abp.Authorization.Tests/Volo/Abp/Authorization/Authorization_Tests.cs
@@ -1,5 +1,6 @@
-using System.Threading.Tasks;
-using Shouldly;
+using Shouldly;
+using System.Threading.Tasks;
+using Volo.Abp.Authorization.Permissions;
 using Volo.Abp.Authorization.TestServices;
 using Xunit;
 
@@ -8,10 +9,12 @@ namespace Volo.Abp.Authorization
     public class Authorization_Tests : AuthorizationTestBase
     {
         private readonly IMyAuthorizedService1 _myAuthorizedService1;
+        private readonly IPermissionDefinitionManager _permissionDefinitionManager;
 
         public Authorization_Tests()
         {
             _myAuthorizedService1 = GetRequiredService<IMyAuthorizedService1>();
+            _permissionDefinitionManager = GetRequiredService<IPermissionDefinitionManager>();
         }
 
         [Fact]
@@ -43,5 +46,11 @@ namespace Volo.Abp.Authorization
         {
             (await _myAuthorizedService1.AnonymousAsync()).ShouldBe(42);
         }
+
+        [Fact]
+        public void Should_Permission_Definition_GetGroup()
+        {
+            _permissionDefinitionManager.GetGroups().Count.ShouldBe(2);
+        }
     }
 }
\ No newline at end of file
diff --git a/framework/test/Volo.Abp.Authorization.Tests/Volo/Abp/Authorization/TestServices/AuthorizationTestPermissionDefinitionProvider.cs b/framework/test/Volo.Abp.Authorization.Tests/Volo/Abp/Authorization/TestServices/AuthorizationTestPermissionDefinitionProvider.cs
index 5775c5466c..fdfd77b986 100644
--- a/framework/test/Volo.Abp.Authorization.Tests/Volo/Abp/Authorization/TestServices/AuthorizationTestPermissionDefinitionProvider.cs
+++ b/framework/test/Volo.Abp.Authorization.Tests/Volo/Abp/Authorization/TestServices/AuthorizationTestPermissionDefinitionProvider.cs
@@ -6,7 +6,12 @@ namespace Volo.Abp.Authorization.TestServices
     {
         public override void Define(IPermissionDefinitionContext context)
         {
-            var group = context.AddGroup("TestGroup");
+            PermissionGroupDefinition getGroup = context.GetGroupOrNull("TestGetGroup");
+            if (getGroup == null)
+            {
+                getGroup = context.AddGroup("TestGetGroup");
+            }
+            PermissionGroupDefinition group = context.AddGroup("TestGroup");
             group.AddPermission("MyAuthorizedService1");
         }
     }