diff --git a/types/sonic-boom/index.d.ts b/types/sonic-boom/index.d.ts
index eca15c0cb7..292770bd0d 100644
--- a/types/sonic-boom/index.d.ts
+++ b/types/sonic-boom/index.d.ts
@@ -7,7 +7,7 @@
 
 import { EventEmitter } from 'events';
 
-export = SonicBoom
+export = SonicBoom;
 
 declare class SonicBoom extends EventEmitter {
     /**
@@ -15,12 +15,12 @@ declare class SonicBoom extends EventEmitter {
      * relative protocol is enabled. Default: process.stdout
      * @returns a new sonic-boom instance
      */
-    constructor(fileDescriptor: String | Number)
+    constructor(fileDescriptor: string | number)
 
     /**
      * Writes the string to the file. It will return false to signal the producer to slow down.
      */
-    write(string: String): void;
+    write(string: string): void;
 
     /**
      * Writes the current buffer to the file if a write was not in progress.
@@ -31,7 +31,7 @@ declare class SonicBoom extends EventEmitter {
     /**
      * Reopen the file in place, useful for log rotation.
      */
-    reopen(file: String): void;
+    reopen(file: string): void;
 
     /**
      * Flushes the buffered data synchronously. This is a costly operation.
diff --git a/types/sonic-boom/sonic-boom-tests.ts b/types/sonic-boom/sonic-boom-tests.ts
index a819ec635f..a3beb06d0c 100644
--- a/types/sonic-boom/sonic-boom-tests.ts
+++ b/types/sonic-boom/sonic-boom-tests.ts
@@ -1,19 +1,12 @@
+import SonicBoom = require('sonic-boom');
+const sonic = new SonicBoom(1);
 
-import SonicBoom = require('sonic-boom')
-const sonic = new SonicBoom(1)
-
-sonic.write('hello sonic\n')
-
-sonic.flush()
-
-sonic.flushSync()
-
-sonic.end()
-
-sonic.destroy()
-
-
+sonic.write('hello sonic\n');
 
+sonic.flush();
 
+sonic.flushSync();
 
+sonic.end();
 
+sonic.destroy();