The TestFailures command will return a list of the labels for all of the calls to Test that have failed in the current session (that is, since the last restart command).

$\mathrm{with}\left(\mathrm{CodeTools}\right)\:$

$\mathrm{Test}\left(\sin \left(\mathrm{\pi }\right)\,0\,\mathrm{label}=''sine\; of\; pi''\right)$

sine of pi passed

$\mathrm{Test}\left(\cos \left(\mathrm{\pi }\right)\,\frac{1}{2}\,\mathrm{label}=''cosine\; of\; pi''\right)$

cosine of pi failed
 Expected result : 1/2
 Evaluated result: -1

Error, (in CodeTools:-Test) TEST FAILED: cosine of pi

$\mathrm{Test}\left(\tan \left(\mathrm{\pi }\right)\,1\right)$

Test 1 failed
 Expected result : 1
 Evaluated result: 0

Error, (in CodeTools:-Test) TEST FAILED

$\mathrm{TestFailures}\left(\right)$

$\left[''cosine\; of\; pi''\,''Test\; 1''\right]$

The CodeTools[TestFailures] command was introduced in Maple 2021.

For more information on Maple 2021 changes, see Updates in Maple 2021.