diff --git a/test/Tests/Introspection.cs b/test/Tests/Introspection.cs
index 7b59485..e0898b3 100644
--- a/test/Tests/Introspection.cs
+++ b/test/Tests/Introspection.cs
@@ -56,8 +56,8 @@ public async Task ActiveToken()
             result.StatusCode.Should().Be(HttpStatusCode.OK);
 
             var request = handler.LastRequest;
-            request.Should().ContainKey("client_id").WhichValue.Should().Be(clientId);
-            request.Should().ContainKey("client_secret").WhichValue.Should().Be(clientSecret);
+            request.Should().ContainKey("client_id").WhoseValue.Should().Be(clientId);
+            request.Should().ContainKey("client_secret").WhoseValue.Should().Be(clientSecret);
         }
 
         [Theory]
@@ -93,17 +93,17 @@ public async Task ActiveToken_With_ClientAssertion(int ttl, string assertion1, s
             result.StatusCode.Should().Be(HttpStatusCode.OK);
 
             var request = handler.LastRequest;
-            request.Should().ContainKey("client_id").WhichValue.Should().Be(clientId);
-            request.Should().ContainKey("client_assertion_type").WhichValue.Should().Be("testType");
-            request.Should().ContainKey("client_assertion").WhichValue.Should().Be(assertion1);
+            request.Should().ContainKey("client_id").WhoseValue.Should().Be(clientId);
+            request.Should().ContainKey("client_assertion_type").WhoseValue.Should().Be("testType");
+            request.Should().ContainKey("client_assertion").WhoseValue.Should().Be(assertion1);
 
             result = await client.GetAsync("http://test");
             result.StatusCode.Should().Be(HttpStatusCode.OK);
 
             request = handler.LastRequest;
-            request.Should().ContainKey("client_id").WhichValue.Should().Be(clientId);
-            request.Should().ContainKey("client_assertion_type").WhichValue.Should().Be("testType");
-            request.Should().ContainKey("client_assertion").WhichValue.Should().Be(assertion2);
+            request.Should().ContainKey("client_id").WhoseValue.Should().Be(clientId);
+            request.Should().ContainKey("client_assertion_type").WhoseValue.Should().Be("testType");
+            request.Should().ContainKey("client_assertion").WhoseValue.Should().Be(assertion2);
         }
 
         [Fact]
diff --git a/test/Tests/Tests.csproj b/test/Tests/Tests.csproj
index 1313eac..5f930d2 100644
--- a/test/Tests/Tests.csproj
+++ b/test/Tests/Tests.csproj
@@ -14,7 +14,7 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="FluentAssertions" Version="5.10.3" />
+    <PackageReference Include="AwesomeAssertions" Version="8.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="9.0.4" />
 
   </ItemGroup>