diff --git a/lib/rules/named-grid-areas-no-invalid/__tests__/index.js b/lib/rules/named-grid-areas-no-invalid/__tests__/index.js
index 4855c7fddb..4f2c75ca83 100644
--- a/lib/rules/named-grid-areas-no-invalid/__tests__/index.js
+++ b/lib/rules/named-grid-areas-no-invalid/__tests__/index.js
@@ -9,6 +9,9 @@ testRule({
 	config: [true],
 
 	accept: [
+		{
+			code: 'a { grid-template-areas: 1fr / auto 1fr auto; }',
+		},
 		{
 			code: 'a { grid-template-areas: "a a a" "b b b"; }',
 		},
diff --git a/lib/rules/named-grid-areas-no-invalid/index.js b/lib/rules/named-grid-areas-no-invalid/index.js
index e9b41a3a3f..13cfa3bd10 100644
--- a/lib/rules/named-grid-areas-no-invalid/index.js
+++ b/lib/rules/named-grid-areas-no-invalid/index.js
@@ -58,6 +58,8 @@ const rule = (primary) => {
 
 			if (reportSent) return;
 
+			if (areas.length === 0) return;
+
 			if (!isRectangular(areas)) {
 				complain(messages.expectedSameNumber());