diff --git a/lib/main.js b/lib/main.js
index ddb10d5..415c7a8 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -2,19 +2,19 @@
 
 const Sink = class Sink {
     write() {
-        throw new Error('Method is not implemented');
+        throw new Error('.write method is not implemented');
     }
 
     read() {
-        throw new Error('Method is not implemented');
+        throw new Error('.read method is not implemented');
     }
 
     delete() {
-        throw new Error('Method is not implemented');
+        throw new Error('.delete method is not implemented');
     }
 
     exist() {
-        throw new Error('Method is not implemented');
+        throw new Error('.exist method is not implemented');
     }
 
     static validateFilePath(filePath) {
diff --git a/test/main.js b/test/main.js
index 4ac6dfb..5f502a0 100644
--- a/test/main.js
+++ b/test/main.js
@@ -13,7 +13,7 @@ test('Sink() - Call .write() method', (t) => {
     const obj = new Sink();
     t.throws(() => {
         obj.write();
-    }, /Method is not implemented/, 'Should throw');
+    }, /.write method is not implemented/, 'Should throw');
     t.end();
 });
 
@@ -21,7 +21,7 @@ test('Sink() - Call .read() method', (t) => {
     const obj = new Sink();
     t.throws(() => {
         obj.read();
-    }, /Method is not implemented/, 'Should throw');
+    }, /.read method is not implemented/, 'Should throw');
     t.end();
 });
 
@@ -29,7 +29,7 @@ test('Sink() - Call .delete() method', (t) => {
     const obj = new Sink();
     t.throws(() => {
         obj.delete();
-    }, /Method is not implemented/, 'Should throw');
+    }, /.delete method is not implemented/, 'Should throw');
     t.end();
 });
 
@@ -37,7 +37,7 @@ test('Sink() - Call .exist() method', (t) => {
     const obj = new Sink();
     t.throws(() => {
         obj.exist();
-    }, /Method is not implemented/, 'Should throw');
+    }, /.exist method is not implemented/, 'Should throw');
     t.end();
 });