diff --git a/src/libraries/Common/tests/System/Net/Security/FakeNtlmServer.cs b/src/libraries/Common/tests/System/Net/Security/FakeNtlmServer.cs
index dc41e11ce7a59..1117b3412f35a 100644
--- a/src/libraries/Common/tests/System/Net/Security/FakeNtlmServer.cs
+++ b/src/libraries/Common/tests/System/Net/Security/FakeNtlmServer.cs
@@ -37,7 +37,6 @@ public FakeNtlmServer(NetworkCredential expectedCredential)
         public bool TargetIsServer { get; set; } = false;
         public bool PreferUnicode { get; set; } = true;
         public bool ForceNegotiateVersion { get; set; } = true;
-        public bool SupportsEncryption { get; set; } = true;
 
         // Negotiation results
         public bool IsAuthenticated { get; private set; }
@@ -233,10 +232,6 @@ private byte[] GenerateChallenge(Flags flags)
             {
                 flags |= Flags.NegotiateVersion;
             }
-            if (!SupportsEncryption)
-            {
-                flags &= ~Flags.NegotiateSeal;
-            }
             // Remove any unsupported flags here
             flags &= Flags.AllSupported;
 
diff --git a/src/libraries/System.Net.Security/tests/UnitTests/NegotiateAuthenticationTests.cs b/src/libraries/System.Net.Security/tests/UnitTests/NegotiateAuthenticationTests.cs
index 9ec5fa3aef176..4a4dbefa6f368 100644
--- a/src/libraries/System.Net.Security/tests/UnitTests/NegotiateAuthenticationTests.cs
+++ b/src/libraries/System.Net.Security/tests/UnitTests/NegotiateAuthenticationTests.cs
@@ -211,13 +211,10 @@ public void NtlmIncorrectExchangeTest()
             Assert.False(fakeNtlmServer.IsAuthenticated);
         }
 
-        [ConditionalTheory(nameof(IsNtlmAvailable))]
-        [InlineData(true)]
-        [InlineData(false)]
-        public void NtlmEncryptionTest(bool serverSupportsEncryption)
+        [ConditionalFact(nameof(IsNtlmAvailable))]
+        public void NtlmEncryptionTest()
         {
             using FakeNtlmServer fakeNtlmServer = new FakeNtlmServer(s_testCredentialRight);
-            fakeNtlmServer.SupportsEncryption = serverSupportsEncryption;
 
             NegotiateAuthentication ntAuth = new NegotiateAuthentication(
                 new NegotiateAuthenticationClientOptions
@@ -239,22 +236,15 @@ public void NtlmEncryptionTest(bool serverSupportsEncryption)
             Assert.Equal(FakeNtlmServer.Flags.NegotiateSeal, (fakeNtlmServer.InitialClientFlags & FakeNtlmServer.Flags.NegotiateSeal));
 
             byte[]? authenticateBlob = ntAuth.GetOutgoingBlob(challengeBlob, out statusCode);
+            Assert.Equal(NegotiateAuthenticationStatusCode.Completed, statusCode);
+            Assert.NotNull(authenticateBlob);
 
-            if (serverSupportsEncryption)
-            {
-                Assert.Equal(NegotiateAuthenticationStatusCode.Completed, statusCode);
-                Assert.NotNull(authenticateBlob);
-                // Validate that the NegotiateSeal flag survived the full exchange
-                Assert.Equal(FakeNtlmServer.Flags.NegotiateSeal, (fakeNtlmServer.NegotiatedFlags & FakeNtlmServer.Flags.NegotiateSeal));
-
-                byte[]? empty = fakeNtlmServer.GetOutgoingBlob(authenticateBlob);
-                Assert.Null(empty);
-                Assert.True(fakeNtlmServer.IsAuthenticated);
-            }
-            else
-            {
-                Assert.Equal(NegotiateAuthenticationStatusCode.QopNotSupported, statusCode);
-            }
+            byte[]? empty = fakeNtlmServer.GetOutgoingBlob(authenticateBlob);
+            Assert.Null(empty);
+            Assert.True(fakeNtlmServer.IsAuthenticated);
+
+            // Validate that the NegotiateSeal flag survived the full exchange
+            Assert.Equal(FakeNtlmServer.Flags.NegotiateSeal, (fakeNtlmServer.NegotiatedFlags & FakeNtlmServer.Flags.NegotiateSeal));
         }
 
         [ConditionalFact(nameof(IsNtlmAvailable))]