diff --git a/src/to-have-style.js b/src/to-have-style.js
index f78272ef..f4190d85 100644
--- a/src/to-have-style.js
+++ b/src/to-have-style.js
@@ -19,8 +19,7 @@ function getStyleDeclaration(document, css) {
 function isSubset(styles, computedStyle) {
   return Object.entries(styles).every(
     ([prop, value]) =>
-      computedStyle.getPropertyValue(prop.toLowerCase()) ===
-      value.toLowerCase(),
+      computedStyle.getPropertyValue(prop.toLowerCase()) === value
   )
 }