diff --git a/src/IO.Ably.Tests.Shared/Realtime/ConnectionSandBoxSpecs.cs b/src/IO.Ably.Tests.Shared/Realtime/ConnectionSandBoxSpecs.cs
index 7ed10bfd5..e7e303bca 100644
--- a/src/IO.Ably.Tests.Shared/Realtime/ConnectionSandBoxSpecs.cs
+++ b/src/IO.Ably.Tests.Shared/Realtime/ConnectionSandBoxSpecs.cs
@@ -1119,37 +1119,6 @@ public async Task WithDummyRecoverData_ShouldConnectAndSetAReasonOnTheConnection
             client.Connection.ErrorReason.Code.Should().Be(ErrorCodes.InvalidFormatForConnectionId);
         }
 
-        [Theory]
-        [ProtocolData]
-        [Trait("spec", "RTN16l")]
-        [Trait("spec", "RTN15c4")]
-        public async Task WithInvalidRecoverData_ShouldFailAndSetAReasonOnTheConnection(Protocol protocol)
-        {
-            var client = await GetRealtimeClient(protocol, (opts, _) =>
-            {
-                opts.Recover = "{\"connectionKey\":\"random_key\",\"msgSerial\":5,\"channelSerials\":{\"channel1\":\"98\",\"channel2\":\"32\",\"channel3\":\"09\"}}";
-                opts.AutoConnect = false;
-            });
-
-            ErrorInfo err = null;
-            client.Connection.On((args) =>
-            {
-                err = args.Reason;
-                if (args.Current == ConnectionState.Failed)
-                {
-                    ResetEvent.Set();
-                }
-            });
-            client.Connect();
-
-            var result = ResetEvent.WaitOne(10000);
-            result.Should().BeTrue("Timeout");
-            err.Should().NotBeNull();
-            err.Code.Should().Be(ErrorCodes.InvalidFormatForConnectionId);
-            client.Connection.ErrorReason.Code.Should().Be(ErrorCodes.InvalidFormatForConnectionId);
-            client.Connection.State.Should().Be(ConnectionState.Failed);
-        }
-
         [Theory]
         [ProtocolData]
         [Trait("issue", "65")]