diff --git a/tests/Feature/BreakpointsTest.php b/tests/Feature/BreakpointsTest.php
index 61df1074..b34db9b5 100644
--- a/tests/Feature/BreakpointsTest.php
+++ b/tests/Feature/BreakpointsTest.php
@@ -78,8 +78,34 @@ it('scans the showcase example heredocs too, where the package teaches its own m
         ->filter(fn (SplFileInfo $file): bool => str_contains($file->getRelativePathname(), 'showcase'.DIRECTORY_SEPARATOR.'sections'))
         ->filter(fn (SplFileInfo $file): bool => str_contains($file->getContents(), "<<<'BLADE'"));
 
-    // The scan reads whole files, so nothing above can be hiding inside a heredoc; this only holds
-    // the premise up, in case the examples ever move out of them.
-    expect($sections)->not->toBeEmpty()
-        ->and($sections->filter(fn (SplFileInfo $file): bool => str_contains($file->getContents(), 'medium:'))->isNotEmpty())->toBeTrue();
+    // Every section still teaches its examples through a heredoc nested inside an @php block
+    // (plan step 38 rewrote what is inside them, not the mechanism), so the two scans above —
+    // which read a file's raw text rather than its parsed Blade or PHP — still reach them.
+    expect($sections)->not->toBeEmpty();
+
+    // The premise itself, proven on a fixture now that plan step 38 has cleared every Tailwind
+    // breakpoint prefix out of the showcase (its own goal, so production content can no longer
+    // carry one): a real file, shaped exactly like a showcase section (an outer heredoc nesting an
+    // inner one, `@php … <<<'BLADE' … BLADE, … @endphp`), still gives up a prefix hiding two
+    // heredocs deep to the same pattern and helper the first test above uses.
+    $directory = sys_get_temp_dir().'/breakpoint-heredoc-probe-'.uniqid();
+    File::ensureDirectoryExists($directory);
+    File::put($directory.'/probe.blade.php', <<<'OUTER'
+        @php
+            $examples = [
+                'Probe' => <<<'BLADE'
+                    <div class="md:flex"></div>
+                    BLADE,
+            ];
+        @endphp
+        OUTER);
+
+    try {
+        $pattern = '/(?<![\w@-])(?:max-)?(?:sm|md|lg|xl|2xl):[a-z\[(-]/';
+        $probe = File::allFiles($directory)[0];
+
+        expect(breakpointOffenders($probe, $pattern))->not->toBeEmpty();
+    } finally {
+        File::deleteDirectory($directory);
+    }
 });