diff --git a/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.mutate-property-from-global.expect.md b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.mutate-property-from-global.expect.md
new file mode 100644
index 0000000000..87f0c65a86
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.mutate-property-from-global.expect.md
@@ -0,0 +1,21 @@
+
+## Input
+
+```javascript
+let wat = {};
+
+function Foo() {
+  delete wat.foo;
+  return wat;
+}
+
+```
+
+
+## Error
+
+```
+[ReactForget] InvalidReact: This mutates a variable after it was passed to React, which means that React cannot observe changes to it (4:4)
+```
+          
+      
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.mutate-property-from-global.js b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.mutate-property-from-global.js
new file mode 100644
index 0000000000..54b42a607d
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.mutate-property-from-global.js
@@ -0,0 +1,6 @@
+let wat = {};
+
+function Foo() {
+  delete wat.foo;
+  return wat;
+}
diff --git a/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.store-property-in-global.expect.md b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.store-property-in-global.expect.md
new file mode 100644
index 0000000000..9e08cb67b7
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.store-property-in-global.expect.md
@@ -0,0 +1,21 @@
+
+## Input
+
+```javascript
+let wat = {};
+
+function Foo() {
+  wat.test = 1;
+  return wat;
+}
+
+```
+
+
+## Error
+
+```
+[ReactForget] InvalidReact: This mutates a variable after it was passed to React, which means that React cannot observe changes to it (4:4)
+```
+          
+      
\ No newline at end of file
diff --git a/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.store-property-in-global.js b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.store-property-in-global.js
new file mode 100644
index 0000000000..a210cd702b
--- /dev/null
+++ b/compiler/packages/babel-plugin-react-forget/src/__tests__/fixtures/compiler/error.store-property-in-global.js
@@ -0,0 +1,6 @@
+let wat = {};
+
+function Foo() {
+  wat.test = 1;
+  return wat;
+}