diff --git a/tests/Feature/StylesheetsTest.php b/tests/Feature/StylesheetsTest.php
index f4c21d0b..c896455e 100644
--- a/tests/Feature/StylesheetsTest.php
+++ b/tests/Feature/StylesheetsTest.php
@@ -324,6 +324,10 @@ it('writes a media query, anywhere all.css reaches, only at M3\'s breakpoints, i
             && preg_match('/(?:^|[\s:<>=(])(?:min-|max-)?height\b/', $feature) === 1
             && ! str_contains($feature, 'width');
 
+        // Range syntax (`width >= 840px`, `840px <= width < 1200px`), as the layout stylesheets'
+        // own check required before it folded into this one: never `min-width`/`max-width`.
+        expect($feature)->not->toMatch('/\b(?:min|max)-(?:width|height|aspect-ratio)\b/', "{$query} is not written as a range");
+
         preg_match_all('/(\d*\.?\d+)([a-z%]*)/i', $feature, $lengths, PREG_SET_ORDER);
 
         foreach ($lengths as [, $number, $unit]) {