The phrase "and it testifies" is correct and usable in written English.
You can use it when referring to evidence or proof that supports a statement or claim.
Example: "The witness provided a detailed account of the events, and it testifies to the truth of his statements."
Alternatives: "and it serves as evidence" or "and it confirms".
In its freedom from the conventional physical analogies of the creative act and in its degree of abstraction, this text is virtually unique in Egypt, and it testifies to the philosophical sophistication of the priests of Memphis.
The measure is to be applauded and it testifies to the inconvenience caused by moving matches to a Friday, in particular ones involving teams separated by hundreds of miles and limited train routes.
It is all at once very extraordinary and very natural, and it testifies to the essential solidarity and immense mutual goodwill of all ranks and classes in the nation.
The music harks back to Celtic mountain ballads, string-band blues, Cajun waltzes and rural gospel hymns, and it testifies to the survival of both a steadfast heritage and one stubborn musician.
And it testified to the difficult task that the civilian government faces in trying to rebuild public security and trust.
It was as close as the concert got to vintage Afrobeat, and it testified to the stubborn power of Fela's music.
I have omitted a vindication of the true punctuation of the clause, because I now take for certain that the original document, signed by the members of the Convention, is in the Department of State, and that it testifies for itself against the erroneous editions of the text in that particular.
But there is a difference between art crudely made because of ineptitude, and art so pointedly crude, and so well conceived and executed, that it testifies to an intention smart enough to demand further thought.
In the United States the Holocaust is a mystery, a puzzle, and the obsessive interest in it testifies to its intrinsic strangeness.
With its short life and great height, the spiky Shard graphically illustrates exponentially increasing inner-city land values, while the chaos of old and new masonry surrounding it testifies to the greed and short-termism of successive generations.
It is the unforgiving stoniness of the natural landscape that impresses him most, and he believes that it testifies to Armenia's ancient heritage and enduring national character: "Here you walk among stones over a stony field.
