'tests and trials' is correct and usable in written English.
It is often used to refer to difficult challenges or obstacles that must be overcome in order to reach a goal. For example: "I had to face many tests and trials before reaching my desired outcome."
Many more tests and trials would be needed.
Pharmaceutical companies have complained that sudden power outages can play havoc with sensitive technical equipment that takes days to reset, slowing medical tests and trials on important drugs.
And Stu Barker's haunting music and the ceaselessly versatile cast of six highlight the mythic ideal that liberty can only be achieved after one has undergone ritual tests and trials.
The isolation of his new surroundings made it more convenient for Atkins to make music alone, so he spent endless days in his bedroom performing tests and trials that laid the foundations for techno.
Diana's experience in war alongside Steve offers tests and trials from which emerges the kind of mutual recognition, forged in the heat of action, that becomes her first experience of romantic love.
In the nineteen-seventies, observing the trials of an experimental aircraft, I intended at first to tell the story in a thousand words, but the tests and trials increased in number, changed, went on for years; a rich stream of characters happened through the scene; and the unfolding story had a natural structure analogous to a dramatic plot.
He also loves test and trials.
So the scientific adviser will collate all that evidence and all that data from their testing and trials and send it back to the UK.
It's all about those things where research and development and testing and trials and marketing is geared more towards those things that will be most profitable rather than towards those things that are necessary for culture.
Subjects were given rest breaks between each test and trials of a test.
When only the test trial included a CS response ('0-1', yellow trace), simple-spike firing rate was higher in the test trial and the trial-over-trial change in simple-spike firing rate was more positive.
