The phrase "after initial tests" is correct and usable in written English.
It can be used to refer to actions or conclusions drawn following preliminary evaluations or assessments.
Example: "After initial tests, we found that the new software significantly improved performance."
Alternatives: "following preliminary tests" or "subsequent to initial evaluations".
And after initial tests were successful, Columbia Facilities became one of Radiator Labs' first clients.
After initial tests, the French authorities said the bottles contained small amounts of the deadly poison ricin.
The result of tests to establish the cause of his death are awaited after initial tests last week proved inconclusive.
Since then, two workers in the building's mail room have tested positive for anthrax exposure, and five other employees are awaiting the results of blood tests after initial tests showed that they might have been exposed.
After initial tests found elevated levels of asbestos, a new round of tests showed only trace amounts of asbestos and suggest the library is a safe place to work.
Initially we started the company by selling solid fuel cooking briquettes, but we quickly found out, after initial tests, that the briquettes became covered in ash very quickly and were unsuitable for cooking.
After initial testing, the analog accelerometer could not perform as well as the digital encoder.
After initial testing in three states, the workplace program is expanding to Alaska, Colorado, Iowa, Michigan, Oklahoma, Vermont, Washington and the District of Columbia.
Several were added to the movie after initial test screenings showed, somewhat unusually, that the audience liked it longer.
The suit was filed after initial testing commissioned by the towns found abnormally high levels of benzene, a carcinogen believed to come from jet fuel.
We decided upon this after initial testing with the 7/8" ball on Lexan with a.625" diameter opening failed to adequately move the robot.
