diff --git a/src/utils/__tests__/environmentVariables.node.js b/src/utils/__tests__/environmentVariables.node.js
index a1072301d..f91ffd81e 100644
--- a/src/utils/__tests__/environmentVariables.node.js
+++ b/src/utils/__tests__/environmentVariables.node.js
@@ -5,7 +5,7 @@
  * @format
  */
 
-import {parseFlipperPorts} from '../environmentVariables';
+import {parseFlipperPorts} from '../environmentVariables.tsx';
 
 test('Valid port overrides are parsed correctly', () => {
   const overrides = parseFlipperPorts('1111,2222');
diff --git a/src/utils/environmentVariables.js b/src/utils/environmentVariables.tsx
similarity index 91%
rename from src/utils/environmentVariables.js
rename to src/utils/environmentVariables.tsx
index 1a7267b78..7cbdf779e 100644
--- a/src/utils/environmentVariables.js
+++ b/src/utils/environmentVariables.tsx
@@ -7,7 +7,7 @@
 
 export function parseFlipperPorts(
   envVar: string,
-): ?{insecure: number, secure: number} {
+): {insecure: number; secure: number} | undefined {
   const components = envVar.split(',');
   const ports = components.map(x => parseInt(x, 10));