The last two tests have invalid answers values, and expect a result. Please either suppress or explain what to do with these invalid values.
Most solutions pass because they do not process these values at all.
I would not appreciate a teacher reasoning I don't if it's wrong or right... just forget it. :)

My fault, I delete the comment line very quickly upon starting a new kata... Sorry.
Thanks!

And, as Insti wrote, the solution checking code is wrong: testing the minimum time without knowning if it is walk or bus time is flawed, check with (14.67, 0.2, 0.37) for example.

Please fix ruby description of predefined speed variables: these are neither

Constants

as described, nor

functions

as syntax lets one think, but

$global_variables

Random broken tests:

Testing for "-6,-5,1-4,-3"
It should work for random inputs too - Expected: "not consecutive", instead got: "incorrect input"
Testing for "0-1,0,1,2"
It should work for random inputs too -  Expected: "not consecutive", instead got: "incorrect input"
Testing for "-9,1-8,-7,-6"
It should work for random inputs too -  Expected: "not consecutive", instead got: "incorrect input"

These are invalid inputs.

Tests and description do not match on the time criteria: test fails when song duration equals the specified time.

Actually, it is a global variable with String keys:

$employees['first_name']

Someone can update Ruby kata description?

Invalid tests occurs sometimes:

Testing 0 people in line, at least 0.6868284179135593 ahead, no more than 0.7337465434779341 behind:
At least 0.6868284179135593 people before Vasya -  Expected: -0.6868284179135593, instead got: 0

It seems happening when there is 0 people in line.

Have this be done for Ruby to? Tests demonstrate rounding error accumulation.

Wrong solution, I did not entirely read the instructions...

It is Ruby.
For example:

Testing for cards 9, 4, 5, 5, 5, 5, 8, 7, 7, 7, 1, 4, 1
Test Passed: Value == 201