diff --git a/src/pure.js b/src/pure.js
index 0f9c487d..761cf3de 100644
--- a/src/pure.js
+++ b/src/pure.js
@@ -283,14 +283,16 @@ function render(
     // they're passing us a custom container or not.
     mountedContainers.add(container)
   } else {
-    mountedRootEntries.forEach(rootEntry => {
-      // Else is unreachable since `mountedContainers` has the `container`.
-      // Only reachable if one would accidentally add the container to `mountedContainers` but not the root to `mountedRootEntries`
-      /* istanbul ignore else */
-      if (rootEntry.container === container) {
-        root = rootEntry.root
-      }
-    })
+    const entry = mountedRootEntries.find(
+      rootEntry => rootEntry.container === container,
+    )
+
+    if (entry) {
+      root = entry.root
+    }
+    // Else is unreachable since `mountedContainers` has the `container`.
+    // Only reachable if one would accidentally add the container to `mountedContainers` but not the root to `mountedRootEntries`
+    /* istanbul ignore else */
   }
 
   return renderRoot(ui, {