Can TVFs be faked

I am trying to isolate dependencies in a stored procedure I want to bring under test, one of which is a TVF. I have tried to use SpyProcedure on the TVF so I can return a known result but the messages window says:
Cannot use SpyProcedure on dbo.TVF_PROMsGetUploadedScorecardsFilteredByHeaders because the procedure does not exist{Private_ValidateProcedureCanBeUsedWithSpyProcedure,8}

How do I isolate this dependency?

The procedure I would like to test is:

SET QUOTED_IDENTIFIER ON
SET ANSI_NULLS ON
GO

ALTER PROCEDURE [dbo].[apPROMSDashboard]
	(
	  @StartDate DATETIME ,
	  @EndDate DATETIME ,
	  @AreaID INT ,
	  @RootReportLevelID INT , 
	  @PipedHeaderIDs VARCHAR(50) ,
	  @ProviderID VARCHAR(10) = NULL 
    )
AS 
	BEGIN
		/*
		-- Header Filters set up up-front so they can be used to filter results before not after selecting.
		*/         
        -- This table holds only those IDs that match all the filters. 
		DECLARE	@UploadIDs TABLE
			(
			  PKID INT PRIMARY KEY
					   IDENTITY(1, 1) ,
			  UploadedID INT ,
			  UNIQUE ( UploadedID )
			)
		INSERT	INTO @UploadIDs
				SELECT	UploadedID
				FROM	TVF_PROMsGetUploadedScorecardsFilteredByHeaders(@PipedHeaderIDs, NULL)

	-- <> -- Get all scorecard results  -----------------------
		DECLARE	@RelevantSummary TABLE
			(
			  PKID INT PRIMARY KEY
					   IDENTITY ,
			  FKProcedureID INT ,
			  PROMSID BIGINT ,
			  EQ5d_IndexChange DECIMAL(20, 3) ,
			  EQ5d_ScaleChange DECIMAL(20, 3) ,
			  EQ5d_ScoreChange DECIMAL(20, 3) ,
			  UploadID INT ,
			  UNIQUE ( UploadID )
			)

		INSERT	INTO @RelevantSummary
				SELECT	DISTINCT
						PES.FKProcedureID ,
						PES.PROMSID ,
						EQ5d_IndexChange ,
						EQ5d_ScaleChange ,
						EQ5d_ScoreChange ,
						FKUploadedScorecardID AS UploadID
				FROM	tblPROMsExportSummary AS PES
						INNER JOIN tvf_GetChildGroups(@AreaID) AS TVF ON TVF.GroupID = PES.FKGroupID
						INNER JOIN @UploadIDs AS ULID ON ULID.UploadedID = PES.FKUploadedScorecardID
				WHERE	PES.ShopDate BETWEEN @StartDate AND @EndDate
						AND FKProcedureID IN ( 1, 2, 3, 4 ) 
     
	-- >< ----------------------------------------------------------------------------------------------
	
		/* Because we use Provider header filter to identify Providers we need to exclude it from ALL results ONLY if running report as a provider */
			-- subtract provider id from @PipedHeadersIDs
		IF @ProviderID IS NOT NULL 
			BEGIN
				SET @PipedHeaderIDs = REPLACE(@PipedHeaderIDs, @ProviderID, '')
				DELETE	FROM @UploadIDs
				INSERT	INTO @UploadIDs
						SELECT	UploadedID
						FROM	TVF_PROMsGetUploadedScorecardsFilteredByHeaders(@PipedHeaderIDs, NULL)
			END     
                
	-- <> -- Get all scorecard results for everything in the root context (SHA)   ---------------
		DECLARE	@RelevantSummaryPCT TABLE
			(
			  PKID INT PRIMARY KEY
					   IDENTITY ,
			  FKProcedureID INT ,
			  PROMSID BIGINT ,
			  EQ5d_IndexChange DECIMAL(20, 3) ,
			  EQ5d_ScaleChange DECIMAL(20, 3) ,
			  EQ5d_ScoreChange DECIMAL(20, 3) ,
			  UploadID INT
			)
	
		INSERT	INTO @RelevantSummaryPCT
				SELECT	DISTINCT
						PES.FKProcedureID ,
						PES.PROMSID ,
						EQ5d_IndexChange ,
						EQ5d_ScaleChange ,
						EQ5d_ScoreChange ,
						FKUploadedScorecardID AS UploadID
				FROM	tblPROMsExportSummary AS PES
						INNER JOIN tvf_GetChildGroups (@RootReportLevelID) AS TVF ON TVF.GroupID = PES.FKGroupID
						INNER JOIN @UploadIDs AS ULID ON ULID.UploadedID = PES.FKUploadedScorecardID
				WHERE	PES.ShopDate BETWEEN @StartDate AND @EndDate
						AND FKProcedureID IN ( 1, 2, 3, 4 ) 
                
	-- >< ----------------------------------------------------------------------------------------------		
	
	-- <> -- Return results to GUI, join up user and PCT results ---------------------------------------

		SELECT	PCT.FKProcedureID ,
				ISNULL(IndexChange, -999) AS IndexChange ,
				ISNULL(ScaleChange, -999) AS ScaleChange ,
				ISNULL(ScoreChange, -999) AS ScoreChange ,
				ISNULL(PCTIndex, -999) AS PCTIndex ,
				ISNULL(PCTScale, -999) AS PCTScale ,
				ISNULL(PCTScore, -999) AS PCTScore
		FROM	( SELECT	FKProcedureID ,
							CAST(AVG(RS.EQ5d_IndexChange) AS DECIMAL(20, 3)) AS IndexChange ,
							CAST(AVG(RS.EQ5d_ScaleChange) AS DECIMAL(20, 3)) AS ScaleChange ,
							CAST(AVG(RS.EQ5d_ScoreChange) AS DECIMAL(20, 3)) AS ScoreChange
				  FROM		@RelevantSummary AS RS
				  GROUP BY	FKProcedureID ) AS T1
				RIGHT JOIN ( SELECT	FKProcedureID ,
									CAST(AVG(PCT.EQ5d_IndexChange) AS DECIMAL(20, 3)) AS PCTIndex ,
									CAST(AVG(PCT.EQ5d_ScaleChange) AS DECIMAL(20, 3)) AS PCTScale ,
									CAST(AVG(PCT.EQ5d_ScoreChange) AS DECIMAL(20, 3)) AS PCTScore
							 FROM	@RelevantSummaryPCT AS PCT
							 GROUP BY FKProcedureID ) AS PCT ON PCT.FKProcedureID = T1.FKProcedureID
		ORDER BY PCT.FKProcedureID
        
	END

GO

In my test I fake tblPROMsExportSummary fine, but because the logic in the stored procedure relies on results being returned from the TVF I get no results when I exercise the sproc.

My test:

ALTER PROCEDURE [Dashboard].[test CCG only results]
AS 
	BEGIN
  --Assemble
		EXEC tSQLt.FakeTable 'dbo.tblPROMsExportSummary'
		EXEC tSQLt.FakeTable 'dbo.tblUploadedScorecardHeaders'
		EXEC tsqlt.SpyProcedure @ProcedureName = N'dbo.TVF_PROMsGetUploadedScorecardsFilteredByHeaders', -- nvarchar(max)
			@CommandToExecute = N'SELECT 1' -- nvarchar(max)
		
		DECLARE	@CCG_ID INT;			SET @CCG_ID = 387;
		DECLARE	@PCT_ID INT;			SET @PCT_ID = 374;
		DECLARE @StartDate DATETIME;	SET @StartDate = '2008-02-01 00:00:00'
  
  --Act
		INSERT	INTO tblPROMsExportSummary
				( PKID ,
				  PROMSID ,
				  FKProcedureID ,
				  EQ5d_IndexChange ,
				  EQ5d_ScaleChange ,
				  EQ5d_ScoreChange ,
				  FKUploadedScorecardID ,
				  ShopDate ,
				  FKGroupID )
		VALUES	( 1 , 
				  123456789 , -- PROMSID - bigint
				  1 , -- FKProcedureID - int
				  1 , -- EQ5d_IndexChange - decimal
				  2 , -- EQ5d_ScaleChange - decimal
				  3 , -- EQ5d_ScoreChange - decimal
				  187 , -- FKUploadedScorecardID - int
				  @StartDate , -- ShopDate - datetime
				  @CCG_ID  -- FKGroupID - int
				  )
  
		INSERT	INTO [Dashboard].Actual
				EXEC apPROMSDashboard @StartDate, @EndDate = '2012-07-31 23:59:59',
					@AreaID = @CCG_ID, @RootReportLevelID = 380, @PipedHeaderIDs = N'', @ProviderID = 0
		DECLARE @rows INT; 
		SET @rows = (SELECT COUNT(*) FROM [Dashboard].Actual)
  
  --Assert
	EXEC tSQLt.AssertEquals @Expected = 2, -- sql_variant
		@Actual = @rows, -- sql_variant
		@Message = N'' -- nvarchar(max)
	
		--EXEC tSQLt.AssertEqualsTable @Expected = N'[Dashboard].Expected', -- nvarchar(max)
		--	@Actual = N'[Dashboard].Actual', -- nvarchar(max)
		--	@FailMsg = N''  
  
	END;