Acid test or acid tests may refer to:

• Acid test (gold), a chemical or metallurgical test which uses acid, now also used as a general term for "verified", "approved", or "tested" in a large number of fields
• Quick ratio, also known as acid-test ratio or acid-test liquidity ratio, a measure of a company's cash liquidity
• Acid Test (band), a Canadian alternative rock band
• ACID-TEST, a Japanese band headed by singer Kazutoshi Sakurai
• The Acid Tests, parties conducted by the Merry Pranksters, centered on the use of LSD (acid)
• The Acid Test, a science quiz from 1994-7 on BBC Five Live hosted by Kate Bellingham
• Acid1, Acid2 and Acid3, test-suites for web-browsers
• within a Petrocalcic Horizon, the use of hydrochloric acid to

  [ Source: Wikipedia ]