diff --git a/packages/react-base16-styling/test/index.test.ts b/packages/react-base16-styling/test/index.test.ts
index 5f765a5d..94360afd 100644
--- a/packages/react-base16-styling/test/index.test.ts
+++ b/packages/react-base16-styling/test/index.test.ts
@@ -70,8 +70,8 @@ const getStylingFromBase16 = (base16: Base16Theme): StylingConfig => ({
   testStyle: {
     color: base16.base00,
   },
-  testFunc: ({ style }, arg: string) => ({
-    className: `testClass--${arg}`,
+  testFunc: ({ style }, arg) => ({
+    className: `testClass--${arg as string}`,
     style: {
       ...style,
       width: 0,
@@ -84,8 +84,8 @@ const getStylingFromBase16 = (base16: Base16Theme): StylingConfig => ({
   additionalStyle: {
     border: 0,
   },
-  testFuncNoStyle: (_, arg: string) => ({
-    className: `testClass--${arg}`,
+  testFuncNoStyle: (_, arg) => ({
+    className: `testClass--${arg as string}`,
   }),
 });