Hi everyone,

I encountered this problem already multiple times and I don’t understand the reason for this behaviour.

I don’t have a minimal working example, but the basic setup is the following:

```
@testset "FirstSet" begin
a = 0.1
b = 0.7
@testset "SecondSet" begin
.... Some transformations based on a and b
.... Check that two different formulations are identical
@test f(a,b) ≈ g(a,b)
end
end
```

This works just fine. However, I would like to do the following, to make sure it works also for different values:

```
@testset "FirstSet" begin
a = 0.1
b = 0.7
@testset "SecondSet" for a = 0.1:0.1:0.2, b = 0.7:0.1:0.8
.... Some transformations based on a and b
.... Check that two different formulations are identical
@test f(a,b) ≈ g(a,b)
end
end
```

Which fails four times. Indeed, even the following fails:

```
@testset "FirstSet" begin
@testset "SecondSet" for a = 0.1, b = 0.7
.... Some transformations based on a and b
.... Check that two different formulations are identical
@test f(a,b) ≈ g(a,b)
end
end
```

Which is, according to my understand, identical to the first. It seems, however, that it isn’t. Can someone explain to me this behavior? I had this problem already a couple of times.