diff --git a/.changeset/pink-dancers-wash.md b/.changeset/pink-dancers-wash.md
new file mode 100644
index 000000000..50605e281
--- /dev/null
+++ b/.changeset/pink-dancers-wash.md
@@ -0,0 +1,5 @@
+---
+'@emotion/cache': patch
+---
+
+Ensure that caches are not reused for different createCache calls
diff --git a/packages/cache/src/index.js b/packages/cache/src/index.js
index 39d66bf91..f1240043a 100644
--- a/packages/cache/src/index.js
+++ b/packages/cache/src/index.js
@@ -32,18 +32,18 @@ export type Options = {
   insertionPoint?: HTMLElement
 }
 
-let getServerStylisCache = isBrowser
-  ? undefined
-  : weakMemoize(() =>
-      memoize(() => {
-        let cache = {}
-        return name => cache[name]
-      })
-    )
-
 const defaultStylisPlugins = [prefixer]
 
 let createCache = (options: Options): EmotionCache => {
+  let getServerStylisCache = isBrowser
+    ? undefined
+    : weakMemoize(() =>
+        memoize(() => {
+          let cache = {}
+          return cache
+        })
+      )
+
   let key = options.key
 
   if (process.env.NODE_ENV !== 'production' && !key) {