The phrase "a testimony for" is correct and usable in written English.
It can be used when referring to a statement or evidence that supports a particular claim or argument.
Example: "Her experiences serve as a testimony for the effectiveness of the new treatment."
Alternatives: "a testament to" or "an endorsement of".
What a testimony for who we truly are!
"I searched the scripture & by humble prayer to my Heavenly Father I obtained a testimony for myself," she wrote.
Though Marketing Land cites some examples of how QR codes can sometimes work, and they're much more effective in Asia, the fact there's a need for an article describing such is a testimony for it's universally accepted failure.
Through music I play, or the way I play the music, or just the fact that I am standing in the booth, I hope this would be a testimony for all to see if GOD loves me giving me the strength to stand, HE also loves them and will give them the strength to stand also.
On November 2, the Subcommittee on International Operations and Organizations, Human Rights, Democracy, and Global Women's Issues and the Subcommittee on Near Eastern and South Central Asian Affairs organized a testimony for the Senate Foreign Relations committee on the role of women in the Arab Spring.
The absolute difference of 11.6% more patients with beneficial neurological outcome and 23.6% higher in-hospital survival rate may nevertheless be seen as a testimony for the potency of this intervention, even in a heterogeneous population.
She helped drive both criminal assault trials with her "victim A" testimony ― no small task for a girl who was then a junior in high school.
The founders voted to name the school after General Lafayette, who famously toured the country in 1824 25, as "a testimony of respect for [his] talents, virtues, and signal services... in the great cause of freedom".
The main riff of the latter is very similar to the one in the song "Foxy Lady", a testimony of Blackmore's admiration for Jimi Hendrix.
It's compliant over rougher roads (a real testimony for a GT), quite manageable even with its F1-style paddle shifters in traffic, and emits all the right buzzing, then roaring, then full-throated growling noises from its exhaust as you gear down to overtake someone on the highway.
"If the economy evolves as we expect, economic conditions likely would make it appropriate at some point this year to raise the federal funds rate," Yellen said in a testimony prepared for a US House panel.
