diff --git a/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletionFunctionCallingTests.cs b/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletionFunctionCallingTests.cs
index c3616167b2c8..17d55396756f 100644
--- a/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletionFunctionCallingTests.cs
+++ b/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletionFunctionCallingTests.cs
@@ -81,7 +81,20 @@ public async Task CanAutoInvokeKernelFunctionsStreamingAsync()
     public async Task CanAutoInvokeKernelFunctionsWithComplexTypeParametersAsync()
     {
         // Arrange
-        var kernel = this.CreateAndInitializeKernel(importHelperPlugin: true);
+        var kernel = this.CreateAndInitializeKernel();
+        kernel.ImportPluginFromFunctions("HelperFunctions",
+        [
+            kernel.CreateFunctionFromMethod((WeatherParameters parameters) =>
+            {
+                if (parameters.City.Name.Equals("Dublin", StringComparison.OrdinalIgnoreCase) &&
+                (parameters.City.Country.Equals("Ireland", StringComparison.OrdinalIgnoreCase) || parameters.City.Country.Equals("IE", StringComparison.OrdinalIgnoreCase)))
+                {
+                    return Task.FromResult(42.8); // 42.8 Fahrenheit.
+                }
+
+                throw new NotSupportedException($"Weather in {parameters.City.Name} ({parameters.City.Country}) is not supported.");
+            }, "Get_Current_Temperature", "Get current temperature."),
+        ]);
 
         AzureOpenAIPromptExecutionSettings settings = new() { ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions };
 
@@ -129,10 +142,19 @@ public async Task CanAutoInvokeKernelFunctionsWithEnumTypeParametersAsync()
     public async Task CanAutoInvokeKernelFunctionFromPromptAsync()
     {
         // Arrange
+        var invokedFunctions = new List<string>();
+
+        var filter = new FakeFunctionFilter(async (context, next) =>
+        {
+            invokedFunctions.Add(context.Function.Name);
+            await next(context);
+        });
+
         var kernel = this.CreateAndInitializeKernel();
+        kernel.FunctionInvocationFilters.Add(filter);
 
         var promptFunction = KernelFunctionFactory.CreateFromPrompt(
-            "Your role is always to return this text - 'A Game-Changer for the Transportation Industry'. Don't ask for more details or context.",
+            "Hey LLM, give me one news title that's hot off the press!",
             functionName: "FindLatestNews",
             description: "Searches for the latest news.");
 
@@ -144,21 +166,30 @@ public async Task CanAutoInvokeKernelFunctionFromPromptAsync()
         AzureOpenAIPromptExecutionSettings settings = new() { ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions };
 
         // Act
-        var result = await kernel.InvokePromptAsync("Show me the latest news as they are.", new(settings));
+        var result = await kernel.InvokePromptAsync("Show me the latest news.", new(settings));
 
         // Assert
-        Assert.NotNull(result);
-        Assert.Contains("Transportation", result.GetValue<string>(), StringComparison.InvariantCultureIgnoreCase);
+        Assert.Contains(invokedFunctions, functionName => functionName.Contains("InvokePromptAsync"));
+        Assert.Contains(invokedFunctions, functionName => functionName.Contains("FindLatestNews"));
     }
 
     [Fact]
     public async Task CanAutoInvokeKernelFunctionFromPromptStreamingAsync()
     {
         // Arrange
+        var invokedFunctions = new List<string>();
+
+        var filter = new FakeFunctionFilter(async (context, next) =>
+        {
+            invokedFunctions.Add(context.Function.Name);
+            await next(context);
+        });
+
         var kernel = this.CreateAndInitializeKernel();
+        kernel.FunctionInvocationFilters.Add(filter);
 
         var promptFunction = KernelFunctionFactory.CreateFromPrompt(
-            "Your role is always to return this text - 'A Game-Changer for the Transportation Industry'. Don't ask for more details or context.",
+            "Hey LLM, give me one news title that's hot off the press!",
             functionName: "FindLatestNews",
             description: "Searches for the latest news.");
 
@@ -170,20 +201,14 @@ public async Task CanAutoInvokeKernelFunctionFromPromptStreamingAsync()
         AzureOpenAIPromptExecutionSettings settings = new() { ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions };
 
         // Act
-        var streamingResult = kernel.InvokePromptStreamingAsync("Show me the latest news as they are.", new(settings));
-
-        var builder = new StringBuilder();
-
+        var streamingResult = kernel.InvokePromptStreamingAsync("Show me the latest news.", new(settings));
         await foreach (var update in streamingResult)
         {
-            builder.Append(update.ToString());
         }
 
-        var result = builder.ToString();
-
         // Assert
-        Assert.NotNull(result);
-        Assert.Contains("Transportation", result, StringComparison.InvariantCultureIgnoreCase);
+        Assert.Contains(invokedFunctions, functionName => functionName.Contains("InvokePromptStreamingAsync"));
+        Assert.Contains(invokedFunctions, functionName => functionName.Contains("FindLatestNews"));
     }
 
     [Fact]
@@ -482,7 +507,7 @@ public async Task ConnectorAgnosticFunctionCallingModelClassesCanBeUsedForAutoFu
         Assert.NotNull(getWeatherForCityFunctionCallResult.Result);
     }
 
-    [Fact(Skip = "Weather in Boston (USA) is not supported.")]
+    [Fact]
     public async Task ConnectorAgnosticFunctionCallingModelClassesCanBeUsedForManualFunctionCallingForStreamingAsync()
     {
         // Arrange
@@ -784,10 +809,13 @@ public async Task ItShouldSupportOldFunctionCallingModelSerializedIntoChatHistor
         string? emailBody = null, emailRecipient = null;
 
         var kernel = this.CreateAndInitializeKernel(importHelperPlugin: true);
-        kernel.ImportPluginFromFunctions("EmailPlugin", [KernelFunctionFactory.CreateFromMethod((string body, string recipient) => { emailBody = body; emailRecipient = recipient; }, "SendEmail")]);
+        kernel.ImportPluginFromFunctions("EmailPlugin", [
+            KernelFunctionFactory.CreateFromMethod((string body, string recipient) => { emailBody = body; emailRecipient = recipient; }, "SendEmail"),
+            KernelFunctionFactory.CreateFromMethod(() => "abc@domain.com", "GetMyEmail")
+        ]);
 
         // The deserialized chat history contains a list of function calls and the final answer to the question regarding the color of the sky in Boston.
-        chatHistory.AddUserMessage("Send the exact answer to my email: abc@domain.com");
+        chatHistory.AddUserMessage("Send the exact answer to my email.");
 
         var settings = new AzureOpenAIPromptExecutionSettings() { ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions };
 
@@ -820,10 +848,13 @@ public async Task ItShouldSupportNewFunctionCallingModelSerializedIntoChatHistor
         string? emailBody = null, emailRecipient = null;
 
         var kernel = this.CreateAndInitializeKernel(importHelperPlugin: true);
-        kernel.ImportPluginFromFunctions("EmailPlugin", [KernelFunctionFactory.CreateFromMethod((string body, string recipient) => { emailBody = body; emailRecipient = recipient; }, "SendEmail")]);
+        kernel.ImportPluginFromFunctions("EmailPlugin", [
+            KernelFunctionFactory.CreateFromMethod((string body, string recipient) => { emailBody = body; emailRecipient = recipient; }, "SendEmail"),
+            KernelFunctionFactory.CreateFromMethod(() => "abc@domain.com", "GetMyEmail")
+         ]);
 
         // The deserialized chat history contains a list of function calls and the final answer to the question regarding the color of the sky in Boston.
-        chatHistory.AddUserMessage("Send the exact answer to my email: abc@domain.com");
+        chatHistory.AddUserMessage("Send the exact answer to my email.");
 
         var settings = new AzureOpenAIPromptExecutionSettings() { ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions };
 
@@ -832,7 +863,7 @@ public async Task ItShouldSupportNewFunctionCallingModelSerializedIntoChatHistor
 
         // Assert
         Assert.Equal("abc@domain.com", emailRecipient);
-        Assert.Contains("61\u00B0F", emailBody);
+        Assert.Contains("61", emailBody);
     }
 
     /// <summary>
@@ -867,7 +898,7 @@ public async Task SubsetOfFunctionsCanBeUsedForFunctionCallingAsync()
         // Arrange
         var kernel = this.CreateAndInitializeKernel();
 
-        var function = kernel.CreateFunctionFromMethod(() => DayOfWeek.Friday, "GetDayOfWeek", "Retrieves the current day of the week.");
+        var function = kernel.CreateFunctionFromMethod(() => DayOfWeek.Friday.ToString(), "GetDayOfWeek", "Retrieves the current day of the week.");
         kernel.ImportPluginFromFunctions("HelperFunctions", [function]);
 
         var chatHistory = new ChatHistory();
@@ -891,7 +922,7 @@ public async Task RequiredFunctionShouldBeCalledAsync()
         // Arrange
         var kernel = this.CreateAndInitializeKernel();
 
-        var function = kernel.CreateFunctionFromMethod(() => DayOfWeek.Friday, "GetDayOfWeek", "Retrieves the current day of the week.");
+        var function = kernel.CreateFunctionFromMethod(() => DayOfWeek.Friday.ToString(), "GetDayOfWeek", "Retrieves the current day of the week.");
         kernel.ImportPluginFromFunctions("HelperFunctions", [function]);
 
         var chatHistory = new ChatHistory();
@@ -939,20 +970,6 @@ private Kernel CreateAndInitializeKernel(bool importHelperPlugin = false)
                         _ => "31 and snowing",
                     };
                 }, "Get_Weather_For_City", "Gets the current weather for the specified city"),
-                kernel.CreateFunctionFromMethod((WeatherParameters parameters) =>
-                {
-                    if (parameters.City.Name == "Dublin" && (parameters.City.Country == "Ireland" || parameters.City.Country == "IE"))
-                    {
-                        return Task.FromResult(42.8); // 42.8 Fahrenheit.
-                    }
-
-                    throw new NotSupportedException($"Weather in {parameters.City.Name} ({parameters.City.Country}) is not supported.");
-                }, "Get_Current_Temperature", "Get current temperature."),
-                kernel.CreateFunctionFromMethod((double temperatureInFahrenheit) =>
-                {
-                    double temperatureInCelsius = (temperatureInFahrenheit - 32) * 5 / 9;
-                    return Task.FromResult(temperatureInCelsius);
-                }, "Convert_Temperature_From_Fahrenheit_To_Celsius", "Convert temperature from Fahrenheit to Celsius.")
             ]);
         }
 
diff --git a/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletion_AutoFunctionChoiceBehaviorTests.cs b/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletion_AutoFunctionChoiceBehaviorTests.cs
index 3e23f3e32cad..6e723aceaccc 100644
--- a/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletion_AutoFunctionChoiceBehaviorTests.cs
+++ b/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletion_AutoFunctionChoiceBehaviorTests.cs
@@ -58,7 +58,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionAutomat
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -94,7 +93,6 @@ public async Task SpecifiedInPromptInstructsConnectorToInvokeKernelFunctionAutom
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -127,7 +125,7 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionManuall
 
         var functionCalls = FunctionCallContent.GetFunctionCalls(result);
         Assert.NotNull(functionCalls);
-        Assert.Single(functionCalls);
+        Assert.NotEmpty(functionCalls);
 
         var functionCall = functionCalls.First();
         Assert.Equal("DateTimeUtils", functionCall.PluginName);
@@ -164,7 +162,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionAutomat
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -205,11 +202,10 @@ public async Task SpecifiedInPromptInstructsConnectorToInvokeKernelFunctionAutom
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
-    [Fact(Skip = "Temporarily disabled to unblock PR pipeline.")]
+    [Fact]
     public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionManuallyForStreamingAsync()
     {
         // Arrange
@@ -240,7 +236,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionManuall
         }
 
         // Assert
-        Assert.Single(functionsForManualInvocation);
         Assert.Contains("DateTimeUtils-GetCurrentDate", functionsForManualInvocation);
 
         Assert.Empty(invokedFunctions);
@@ -275,7 +270,7 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeNonKernelFunctionManu
 
         var functionCalls = FunctionCallContent.GetFunctionCalls(result);
         Assert.NotNull(functionCalls);
-        Assert.Single(functionCalls);
+        Assert.NotEmpty(functionCalls);
 
         var functionCall = functionCalls.First();
         Assert.Equal("DateTimeUtils", functionCall.PluginName);
@@ -313,7 +308,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeNonKernelFunctionManu
         }
 
         // Assert
-        Assert.Single(functionsForManualInvocation);
         Assert.Contains("DateTimeUtils-GetCurrentDate", functionsForManualInvocation);
 
         Assert.Empty(invokedFunctions);
diff --git a/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletion_RequiredFunctionChoiceBehaviorTests.cs b/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletion_RequiredFunctionChoiceBehaviorTests.cs
index 87dba474cb62..b155b9204e47 100644
--- a/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletion_RequiredFunctionChoiceBehaviorTests.cs
+++ b/dotnet/src/IntegrationTests/Connectors/AzureOpenAI/AzureOpenAIChatCompletion_RequiredFunctionChoiceBehaviorTests.cs
@@ -98,7 +98,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionAutomat
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -134,7 +133,6 @@ public async Task SpecifiedInPromptInstructsConnectorToInvokeKernelFunctionAutom
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -167,7 +165,7 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionManuall
 
         var functionCalls = FunctionCallContent.GetFunctionCalls(result);
         Assert.NotNull(functionCalls);
-        Assert.Single(functionCalls);
+        Assert.NotEmpty(functionCalls);
 
         var functionCall = functionCalls.First();
         Assert.Equal("DateTimeUtils", functionCall.PluginName);
@@ -250,7 +248,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionAutomat
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -291,7 +288,6 @@ public async Task SpecifiedInPromptInstructsConnectorToInvokeKernelFunctionAutom
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -326,7 +322,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionManuall
         }
 
         // Assert
-        Assert.Single(functionsForManualInvocation);
         Assert.Contains("DateTimeUtils-GetCurrentDate", functionsForManualInvocation);
 
         Assert.Empty(invokedFunctions);
@@ -361,7 +356,7 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeNonKernelFunctionManu
 
         var functionCalls = FunctionCallContent.GetFunctionCalls(result);
         Assert.NotNull(functionCalls);
-        Assert.Single(functionCalls);
+        Assert.NotEmpty(functionCalls);
 
         var functionCall = functionCalls.First();
         Assert.Equal("DateTimeUtils", functionCall.PluginName);
@@ -399,7 +394,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeNonKernelFunctionManu
         }
 
         // Assert
-        Assert.Single(functionsForManualInvocation);
         Assert.Contains("DateTimeUtils-GetCurrentDate", functionsForManualInvocation);
 
         Assert.Empty(invokedFunctions);
diff --git a/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_AutoFunctionChoiceBehaviorTests.cs b/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_AutoFunctionChoiceBehaviorTests.cs
index 905e4edf5159..2a7d1d6f8f63 100644
--- a/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_AutoFunctionChoiceBehaviorTests.cs
+++ b/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_AutoFunctionChoiceBehaviorTests.cs
@@ -55,7 +55,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionAutomat
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -91,7 +90,6 @@ public async Task SpecifiedInPromptInstructsConnectorToInvokeKernelFunctionAutom
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -124,7 +122,7 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionManuall
 
         var functionCalls = FunctionCallContent.GetFunctionCalls(result);
         Assert.NotNull(functionCalls);
-        Assert.Single(functionCalls);
+        Assert.NotEmpty(functionCalls);
 
         var functionCall = functionCalls.First();
         Assert.Equal("DateTimeUtils", functionCall.PluginName);
@@ -161,7 +159,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionAutomat
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -202,7 +199,6 @@ public async Task SpecifiedInPromptInstructsConnectorToInvokeKernelFunctionAutom
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -237,7 +233,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionManuall
         }
 
         // Assert
-        Assert.Single(functionsForManualInvocation);
         Assert.Contains("DateTimeUtils-GetCurrentDate", functionsForManualInvocation);
 
         Assert.Empty(invokedFunctions);
@@ -272,7 +267,7 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeNonKernelFunctionManu
 
         var functionCalls = FunctionCallContent.GetFunctionCalls(result);
         Assert.NotNull(functionCalls);
-        Assert.Single(functionCalls);
+        Assert.NotEmpty(functionCalls);
 
         var functionCall = functionCalls.First();
         Assert.Equal("DateTimeUtils", functionCall.PluginName);
@@ -310,7 +305,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeNonKernelFunctionManu
         }
 
         // Assert
-        Assert.Single(functionsForManualInvocation);
         Assert.Contains("DateTimeUtils-GetCurrentDate", functionsForManualInvocation);
 
         Assert.Empty(invokedFunctions);
diff --git a/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_FunctionCallingTests.cs b/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_FunctionCallingTests.cs
index 0423323cfab0..a9659d146899 100644
--- a/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_FunctionCallingTests.cs
+++ b/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_FunctionCallingTests.cs
@@ -80,7 +80,19 @@ public async Task CanAutoInvokeKernelFunctionsStreamingAsync()
     public async Task CanAutoInvokeKernelFunctionsWithComplexTypeParametersAsync()
     {
         // Arrange
-        var kernel = this.CreateAndInitializeKernel(importHelperPlugin: true);
+        var kernel = this.CreateAndInitializeKernel();
+        kernel.ImportPluginFromFunctions("HelperFunctions",
+        [
+            kernel.CreateFunctionFromMethod((WeatherParameters parameters) =>
+            {
+                if (parameters.City.Name == "Dublin" && (parameters.City.Country == "Ireland" || parameters.City.Country == "IE"))
+                {
+                    return Task.FromResult(42.8); // 42.8 Fahrenheit.
+                }
+
+                throw new NotSupportedException($"Weather in {parameters.City.Name} ({parameters.City.Country}) is not supported.");
+            }, "Get_Current_Temperature", "Get current temperature."),
+        ]);
 
         OpenAIPromptExecutionSettings settings = new() { ToolCallBehavior = ToolCallBehavior.AutoInvokeKernelFunctions };
 
@@ -185,7 +197,7 @@ public async Task CanAutoInvokeKernelFunctionFromPromptStreamingAsync()
         Assert.Contains("Transportation", result, StringComparison.InvariantCultureIgnoreCase);
     }
 
-    [Fact(Skip = "Temporarily disabled to unblock PR pipeline.")]
+    [Fact]
     public async Task ConnectorSpecificChatMessageContentClassesCanBeUsedForManualFunctionCallingAsync()
     {
         // Arrange
@@ -482,7 +494,7 @@ public async Task ConnectorAgnosticFunctionCallingModelClassesCanBeUsedForAutoFu
         Assert.NotNull(getWeatherForCityFunctionCallResult.Result);
     }
 
-    [Fact(Skip = "Weather in Boston (USA) is not supported.")]
+    [Fact]
     public async Task ConnectorAgnosticFunctionCallingModelClassesCanBeUsedForManualFunctionCallingForStreamingAsync()
     {
         // Arrange
@@ -867,7 +879,7 @@ public async Task SubsetOfFunctionsCanBeUsedForFunctionCallingAsync()
         // Arrange
         var kernel = this.CreateAndInitializeKernel();
 
-        var function = kernel.CreateFunctionFromMethod(() => DayOfWeek.Friday, "GetDayOfWeek", "Retrieves the current day of the week.");
+        var function = kernel.CreateFunctionFromMethod(() => DayOfWeek.Friday.ToString(), "GetDayOfWeek", "Retrieves the current day of the week.");
         kernel.ImportPluginFromFunctions("HelperFunctions", [function]);
 
         var chatHistory = new ChatHistory();
@@ -891,7 +903,7 @@ public async Task RequiredFunctionShouldBeCalledAsync()
         // Arrange
         var kernel = this.CreateAndInitializeKernel();
 
-        var function = kernel.CreateFunctionFromMethod(() => DayOfWeek.Friday, "GetDayOfWeek", "Retrieves the current day of the week.");
+        var function = kernel.CreateFunctionFromMethod(() => DayOfWeek.Friday.ToString(), "GetDayOfWeek", "Retrieves the current day of the week.");
         kernel.ImportPluginFromFunctions("HelperFunctions", [function]);
 
         var chatHistory = new ChatHistory();
@@ -937,20 +949,6 @@ private Kernel CreateAndInitializeKernel(bool importHelperPlugin = false)
                         _ => "31 and snowing",
                     };
                 }, "Get_Weather_For_City", "Gets the current weather for the specified city"),
-                kernel.CreateFunctionFromMethod((WeatherParameters parameters) =>
-                {
-                    if (parameters.City.Name == "Dublin" && (parameters.City.Country == "Ireland" || parameters.City.Country == "IE"))
-                    {
-                        return Task.FromResult(42.8); // 42.8 Fahrenheit.
-                    }
-
-                    throw new NotSupportedException($"Weather in {parameters.City.Name} ({parameters.City.Country}) is not supported.");
-                }, "Get_Current_Temperature", "Get current temperature."),
-                kernel.CreateFunctionFromMethod((double temperatureInFahrenheit) =>
-                {
-                    double temperatureInCelsius = (temperatureInFahrenheit - 32) * 5 / 9;
-                    return Task.FromResult(temperatureInCelsius);
-                }, "Convert_Temperature_From_Fahrenheit_To_Celsius", "Convert temperature from Fahrenheit to Celsius.")
             ]);
         }
 
diff --git a/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_RequiredFunctionChoiceBehaviorTests.cs b/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_RequiredFunctionChoiceBehaviorTests.cs
index 9ef51074d40a..3bb20904e0c8 100644
--- a/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_RequiredFunctionChoiceBehaviorTests.cs
+++ b/dotnet/src/IntegrationTests/Connectors/OpenAI/OpenAIChatCompletion_RequiredFunctionChoiceBehaviorTests.cs
@@ -96,7 +96,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeRequiredFunctionAutom
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -132,7 +131,6 @@ public async Task SpecifiedInPromptInstructsConnectorToInvokeKernelFunctionAutom
         // Assert
         Assert.NotNull(result);
 
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -165,7 +163,7 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionManuall
 
         var functionCalls = FunctionCallContent.GetFunctionCalls(result);
         Assert.NotNull(functionCalls);
-        Assert.Single(functionCalls);
+        Assert.NotEmpty(functionCalls);
 
         var functionCall = functionCalls.First();
         Assert.Equal("DateTimeUtils", functionCall.PluginName);
@@ -238,7 +236,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionAutomat
         }
 
         // Assert
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -278,8 +275,6 @@ public async Task SpecifiedInPromptInstructsConnectorToInvokeKernelFunctionAutom
 
         // Assert
         Assert.NotNull(result);
-
-        Assert.Single(invokedFunctions);
         Assert.Contains("GetCurrentDate", invokedFunctions);
     }
 
@@ -314,7 +309,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeKernelFunctionManuall
         }
 
         // Assert
-        Assert.Single(functionsForManualInvocation);
         Assert.Contains("DateTimeUtils-GetCurrentDate", functionsForManualInvocation);
 
         Assert.Empty(invokedFunctions);
@@ -349,7 +343,7 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeNonKernelFunctionManu
 
         var functionCalls = FunctionCallContent.GetFunctionCalls(result);
         Assert.NotNull(functionCalls);
-        Assert.Single(functionCalls);
+        Assert.NotEmpty(functionCalls);
 
         var functionCall = functionCalls.First();
         Assert.Equal("DateTimeUtils", functionCall.PluginName);
@@ -387,7 +381,6 @@ public async Task SpecifiedInCodeInstructsConnectorToInvokeNonKernelFunctionManu
         }
 
         // Assert
-        Assert.Single(functionsForManualInvocation);
         Assert.Contains("DateTimeUtils-GetCurrentDate", functionsForManualInvocation);
 
         Assert.Empty(invokedFunctions);