diff --git a/packages/ui/src/storybook.test.ts b/packages/ui/src/storybook.test.ts
index 9b73c69..9a18ecd 100644
--- a/packages/ui/src/storybook.test.ts
+++ b/packages/ui/src/storybook.test.ts
@@ -138,14 +138,20 @@ describe("Storybook inventory", () => {
   });
 
   test("exports component prop interfaces through grouped package entrypoints", () => {
+    let propInterfaceCount = 0;
+
     for (const component of componentInventory()) {
       const source = readFileSync(component.path, "utf8");
       const propTypeName = `${component.name}Props`;
+      const propExportPattern = new RegExp(
+        `export\\s+(interface|type)\\s+${propTypeName}\\b`,
+      );
 
-      if (!source.match(new RegExp(`export\\\\s+(interface|type)\\\\s+${propTypeName}\\\\b`))) {
+      if (!propExportPattern.test(source)) {
         continue;
       }
 
+      propInterfaceCount += 1;
       const domainIndexSource = readFileSync(
         join(componentsDir, component.domain, "index.ts"),
         "utf8",
@@ -155,6 +161,8 @@ describe("Storybook inventory", () => {
         `export * from "./${component.name}";`,
       );
     }
+
+    expect(propInterfaceCount).toBeGreaterThan(0);
   });
 
   test("keeps Storybook fixtures generic and content-free", () => {