diff --git a/tests/ref/h-and-v.png b/tests/ref/func-h-and-v.png similarity index 100% rename from tests/ref/h-and-v.png rename to tests/ref/func-h-and-v.png diff --git a/tests/ref/image-fit.png b/tests/ref/func-image-fit.png similarity index 100% rename from tests/ref/image-fit.png rename to tests/ref/func-image-fit.png diff --git a/tests/ref/image-formats.png b/tests/ref/func-image-formats.png similarity index 100% rename from tests/ref/image-formats.png rename to tests/ref/func-image-formats.png diff --git a/tests/ref/page-body.png b/tests/ref/func-page-body.png similarity index 100% rename from tests/ref/page-body.png rename to tests/ref/func-page-body.png diff --git a/tests/ref/page-dirs.png b/tests/ref/func-page-dirs.png similarity index 100% rename from tests/ref/page-dirs.png rename to tests/ref/func-page-dirs.png diff --git a/tests/ref/page-metrics.png b/tests/ref/func-page-metrics.png similarity index 100% rename from tests/ref/page-metrics.png rename to tests/ref/func-page-metrics.png diff --git a/tests/ref/pagebreak.png b/tests/ref/func-pagebreak.png similarity index 100% rename from tests/ref/pagebreak.png rename to tests/ref/func-pagebreak.png diff --git a/tests/ref/rgb.png b/tests/ref/func-rgb.png similarity index 100% rename from tests/ref/rgb.png rename to tests/ref/func-rgb.png diff --git a/tests/typ/h-and-v.typ b/tests/typ/func-h-and-v.typ similarity index 100% rename from tests/typ/h-and-v.typ rename to tests/typ/func-h-and-v.typ diff --git a/tests/typ/image-error.typ b/tests/typ/func-image-error.typ similarity index 100% rename from tests/typ/image-error.typ rename to tests/typ/func-image-error.typ diff --git a/tests/typ/image-fit.typ b/tests/typ/func-image-fit.typ similarity index 100% rename from tests/typ/image-fit.typ rename to tests/typ/func-image-fit.typ diff --git a/tests/typ/image-formats.typ b/tests/typ/func-image-formats.typ similarity index 100% rename from tests/typ/image-formats.typ rename to tests/typ/func-image-formats.typ diff --git a/tests/typ/page-body.typ b/tests/typ/func-page-body.typ similarity index 100% rename from tests/typ/page-body.typ rename to tests/typ/func-page-body.typ diff --git a/tests/typ/page-dirs.typ b/tests/typ/func-page-dirs.typ similarity index 100% rename from tests/typ/page-dirs.typ rename to tests/typ/func-page-dirs.typ diff --git a/tests/typ/page-error.typ b/tests/typ/func-page-error.typ similarity index 100% rename from tests/typ/page-error.typ rename to tests/typ/func-page-error.typ diff --git a/tests/typ/page-metrics.typ b/tests/typ/func-page-metrics.typ similarity index 100% rename from tests/typ/page-metrics.typ rename to tests/typ/func-page-metrics.typ diff --git a/tests/typ/pagebreak.typ b/tests/typ/func-pagebreak.typ similarity index 100% rename from tests/typ/pagebreak.typ rename to tests/typ/func-pagebreak.typ diff --git a/tests/typ/rgb.typ b/tests/typ/func-rgb.typ similarity index 100% rename from tests/typ/rgb.typ rename to tests/typ/func-rgb.typ