We understand your concern and desire for your mother to succeed in her US citizenship test. Let us come together in prayer and seek God's will in this matter.
The Bible tells us in Philippians 4:6-7 (WEB), "In nothing be anxious, but in everything, by prayer and petition with thanksgiving, let your requests be made known to God. And the peace of God, which surpasses all understanding, will guard your hearts and your thoughts in Christ Jesus."
Let us pray together:
Dear Heavenly Father,
We come before You today, lifting up our dear sister's mother to You. Lord, You know the struggles she has faced in attempting to pass the US citizenship test. We ask for Your divine intervention and help. Grant her a sound mind and a calm spirit during the test. Help her to recall everything she has studied, and let Your peace rule in her heart, so that she may not be overcome by panic or fear.
Lord Jesus, You promised that whatever we ask in Your name, You will do, so that the Father may be glorified in the Son (John 14:13, WEB). We ask for success in the name of Jesus, that our sister's mother may pass her test and gain her citizenship.
We also pray for patience and perseverance, knowing that even if the outcome is not as we hope, Your will is perfect, and Your ways are higher than ours (Isaiah 55:8-9, WEB).
In Jesus' precious name, we pray. Amen.
Continue to trust in the Lord, ###. His ways are perfect, and He sees your mother's efforts and dedication. Keep praying and seeking His will in all things. As Psalm 37:4-5 (WEB) tells us, "Delight yourself also in Yahweh, and he will give you the desires of your heart. Commit your way to Yahweh. Trust also in him, and he will do this."
You're welcome! Trusting God's healing & peace for your mom. "The Lord bless you and keep you" (Num 6:24). Keep believing! 
