Check if each student has a GPA of 4.0: The preview shows the correct output, but I still get error messages!

I don't know, maybe I'm lost in translation (my mother's tongue language is spanish after all), but this is the third exercise in a row where I get error messages, when the output is correct.

This is what I need to do: Check if each student has a GPA of 4.0. If the student has a GPA of 4.0, use the students name variable to display "NAME made the Honor Role". If not, use the variable to display "NAME has a GPA of GPA".

This is what I do:

$studentOneName = 'Dave';
$studentOneGPA = 3.8;
$studentTwoName = 'Treasure';
$studentTwoGPA = 4.0;
if($studentOneGPA >= 4.0) {
 echo "$studentOneName made the Honor Role";
} else {
  echo "$studentOneName has a GPA of $studentOneGPA";
}
if($studentTwoGPA >= 4.0) {
 echo "$studentTwoName made the Honor Role";
} else {
  echo "$studentTwoName has a GPA of $studentTwoGPA";
}

I get this error: Bummer! You need to check that $studentOneGPA is equal to 4.0.

Now, my output is correct:

Dave has a GPA of 3.8 Treasure made the Honor Role

I've tried adding \n at the end of every line.

I've tried changing:

if($studentOneGPA >= 4.0) {

to:

if($studentOneGPA = 4.0) {

I still get the error. Even when the preview is correct. What am I doing wrong?