diff --git a/tslint.json b/tslint.json
index 3db14f8..5107fb4 100644
--- a/tslint.json
+++ b/tslint.json
@@ -1 +1,6 @@
-{ "extends": "dtslint/dt.json" }
+{
+    "extends": "dtslint/dt.json",
+    "rules": {
+        "interface-name": [true, "always-prefix"]
+    }
+}
diff --git a/xlsx-tests.ts b/xlsx-tests.ts
index 83d0b19..1d25a94 100644
--- a/xlsx-tests.ts
+++ b/xlsx-tests.ts
@@ -15,11 +15,11 @@ const firstworksheet = workbook.Sheets[firstsheet];
 
 console.log(firstworksheet["A1"]);
 
-interface tester {
+interface ITester {
     name: string;
     age: number;
 }
 
-const jsonvalues: tester[] = xlsx.utils.sheet_to_json<tester>(firstworksheet);
+const jsonvalues: ITester[] = xlsx.utils.sheet_to_json<ITester>(firstworksheet);
 const csv = xlsx.utils.sheet_to_csv(firstworksheet);
 const formulae = xlsx.utils.sheet_to_formulae(firstworksheet);