diff --git a/scss/westgate/_wiki-prose.scss b/scss/westgate/_wiki-prose.scss
index d9cae8f..54e17e2 100644
--- a/scss/westgate/_wiki-prose.scss
+++ b/scss/westgate/_wiki-prose.scss
@@ -1173,6 +1173,21 @@
 	display: contents;
 }
 
+@media (min-width: 768px) {
+	.westgate-wiki .wiki-article-prose .wiki-infobox ~ .wg-mobile-table-scroll {
+		display: block;
+		width: calc(100% - var(--wiki-infobox-reader-width) - var(--wiki-infobox-reader-gutter));
+		max-width: calc(100% - var(--wiki-infobox-reader-width) - var(--wiki-infobox-reader-gutter));
+		overflow-x: auto;
+	}
+
+	.westgate-wiki .wiki-article-prose .wiki-infobox ~ .wg-mobile-table-scroll > table[style*="width:100%"],
+	.westgate-wiki .wiki-article-prose .wiki-infobox ~ .wg-mobile-table-scroll > table[style*="width: 100%"] {
+		width: 100% !important;
+		max-width: 100%;
+	}
+}
+
 @media (max-width: 767.98px) {
 	.westgate-wiki .wiki-article-prose .wg-mobile-table-scroll,
 	.westgate-wiki .wiki-article-prose :where(.tableWrapper, .table-responsive, .table-responsive-sm, .table-responsive-md, figure.table),
diff --git a/tests/wiki-mobile-table-rendering.test.js b/tests/wiki-mobile-table-rendering.test.js
index bf45ba9..82c5ee4 100644
--- a/tests/wiki-mobile-table-rendering.test.js
+++ b/tests/wiki-mobile-table-rendering.test.js
@@ -11,6 +11,8 @@ const mobileMediaMatch = stylesheet.match(/@media\s*\(max-width:\s*767\.98px\)\s
 assert(mobileMediaMatch, "Expected a mobile-width table rendering media query");
 
 const mobileStyles = mobileMediaMatch[0];
+const infoboxWidth = "calc(100% - var(--wiki-infobox-reader-width) - var(--wiki-infobox-reader-gutter))";
+const infoboxWidthPattern = infoboxWidth.replace(/[()]/g, "\\$&").replace(/\s+/g, "\\s*");
 
 [
 	".westgate-wiki .wiki-article-prose .wg-mobile-table-scroll",
@@ -54,3 +56,21 @@ assert(
 	!mobileStyles.includes(".westgate-wiki .wiki-page-content.wiki-article-prose > .card-body {\n\t\tmax-inline-size: 100%;\n\t\toverflow-x: auto"),
 	"Mobile table scrolling should be scoped to table wrappers, not the whole article body"
 );
+
+assert.match(
+	stylesheet,
+	new RegExp(
+		"@media\\s*\\(min-width:\\s*768px\\)\\s*\\{[\\s\\S]*" +
+			"\\.westgate-wiki\\s+\\.wiki-article-prose\\s+\\.wiki-infobox\\s*~\\s*\\.wg-mobile-table-scroll\\s*\\{[^}]*" +
+			"width:\\s*" + infoboxWidthPattern + "[^}]*" +
+			"max-width:\\s*" + infoboxWidthPattern,
+		"s"
+	),
+	"Desktop article tables wrapped by the theme's mobile scroll helper should still shrink beside floated infoboxes"
+);
+
+assert.match(
+	stylesheet,
+	/@media\s*\(min-width:\s*768px\)\s*\{[\s\S]*\.westgate-wiki\s+\.wiki-article-prose\s+\.wiki-infobox\s*~\s*\.wg-mobile-table-scroll\s*>\s*table\[style\*="width:100%"\],\s*\.westgate-wiki\s+\.wiki-article-prose\s+\.wiki-infobox\s*~\s*\.wg-mobile-table-scroll\s*>\s*table\[style\*="width: 100%"\]\s*\{[^}]*width:\s*100%\s*!important[^}]*max-width:\s*100%/s,
+	"Fluid-width tables inside the theme's scroll wrapper should fill the shrunken infobox-safe wrapper"
+);