diff --git a/index.js b/index.js
index dde1400..ff18558 100644
--- a/index.js
+++ b/index.js
@@ -21,6 +21,7 @@ const getTypeMismatchError = ({ filename, expected, actual }) => {
 
 const cssModuleToNamedExports = cssModuleKeys => {
   return cssModuleKeys
+    .sort()
     .map(key => `export const ${key}: string;`)
     .join('\n')
     .concat('\n');
diff --git a/test/emit-declaration/__snapshots__/emit-declaration.test.js.snap b/test/emit-declaration/__snapshots__/emit-declaration.test.js.snap
index 41d7c7d..ffd40cc 100644
--- a/test/emit-declaration/__snapshots__/emit-declaration.test.js.snap
+++ b/test/emit-declaration/__snapshots__/emit-declaration.test.js.snap
@@ -3,8 +3,8 @@
 exports[`Can emit valid declaration 1`] = `
 "// This file is automatically generated.
 // Please do not change this file!
-export const validClass: string;
-export const someClass: string;
 export const otherClass: string;
+export const someClass: string;
+export const validClass: string;
 "
 `;
diff --git a/test/verify-valid-declaration/index.css b/test/verify-valid-declaration/index.css
index ff76698..8bdba1f 100644
--- a/test/verify-valid-declaration/index.css
+++ b/test/verify-valid-declaration/index.css
@@ -1,3 +1,7 @@
+.validClass {
+  position: relative;
+}
+
 .someClass {
   position: relative;
 }
diff --git a/test/verify-valid-declaration/index.css.d.ts b/test/verify-valid-declaration/index.css.d.ts
index 0f50198..3114b85 100644
--- a/test/verify-valid-declaration/index.css.d.ts
+++ b/test/verify-valid-declaration/index.css.d.ts
@@ -1,4 +1,5 @@
 // This file is automatically generated.
 // Please do not change this file!
-export const someClass: string;
 export const otherClass: string;
+export const someClass: string;
+export const validClass: string;