diff --git a/code/addons/test/src/components/TestProviderRender.tsx b/code/addons/test/src/components/TestProviderRender.tsx
index 0c1185ab6f2a..3590672fb63b 100644
--- a/code/addons/test/src/components/TestProviderRender.tsx
+++ b/code/addons/test/src/components/TestProviderRender.tsx
@@ -314,7 +314,7 @@ export const TestProviderRender: FC<
                   aria-label={`status: ${coverageSummary.status}`}
                 />
               }
-              right={`${coverageSummary.percentage}%`}
+              right={coverageSummary.percentage ?? `${coverageSummary.percentage}%`}
             />
           ) : (
             <ListItem