| PASS | Default column-gap is 'normal' | |
| PASS | column-gap accepts pixels | |
| PASS | column-gap accepts em | |
| PASS | column-gap accepts vw | |
| PASS | column-gap accepts percentage | |
| PASS | column-gap accepts calc() | |
| PASS | column-gap accepts calc() mixing fixed and percentage values | |
| PASS | Initial column-gap is 'normal' | |
| PASS | Initial column-gap is 'normal' 2 | |
| PASS | Initial inherited column-gap is 'normal' | |
| PASS | column-gap is inheritable | |
| PASS | Negative column-gap is invalid | |
| PASS | 'max-content' column-gap is invalid | |
| PASS | 'none' column-gap is invalid | |
| PASS | column-gap with multiple values is invalid | |
| PASS | Angle column-gap is invalid | |
| PASS | Resolution column-gap is invalid | |
| PASS | Time column-gap is invalid | |