diff --git a/src/diff/index.js b/src/diff/index.js
index f8a35ca14d..fbef9a0aca 100644
--- a/src/diff/index.js
+++ b/src/diff/index.js
@@ -376,8 +376,8 @@ function diffElementNodes(
 	let checked;
 
 	// Tracks entering and exiting namespaces when descending through the tree.
-	if (nodeType == 'svg') namespace = 2;
-	else if (nodeType == 'math') namespace = 3;
+	if (nodeType === 'svg') namespace = 2;
+	else if (nodeType === 'math') namespace = 3;
 
 	if (excessDomChildren != null) {
 		for (i = 0; i < excessDomChildren.length; i++) {
@@ -502,7 +502,7 @@ function diffElementNodes(
 				newVNode,
 				oldVNode,
 				globalContext,
-				nodeType == 'foreignObject' ? 1 : namespace,
+				nodeType === 'foreignObject' ? 1 : namespace,
 				excessDomChildren,
 				commitQueue,
 				excessDomChildren