Please prove that.
Read the verse.
Who is mentioned? Bereans.
What were they praised for? Searching the scriptures.
What were the scriptures - as Greek speaking JEWS (not Christians) - that they knew and recognized? The Old Testament.
Some Protestants recognize this simple fact:
“searched the scriptures daily whether those things were so—whether the Christian interpretation which the apostle put upon the Old Testament Scriptures was the true one.” (Commentary Critical and Explanatory on the Whole Bible)