diff --git a/src/common/InputHandler.test.ts b/src/common/InputHandler.test.ts
index 3b8d1387..8cc1bc97 100644
--- a/src/common/InputHandler.test.ts
+++ b/src/common/InputHandler.test.ts
@@ -1694,16 +1694,13 @@ describe('InputHandler', () => {
   });
   describe('OSC', () => {
     it('should ignore incorrect Ansi color change data', () => {
-      assert.deepEqual(inputHandler.parseAnsiColorChange('17;rgb:1a/2b/3c'), {
-        colorIndex: 17,
-        red: 0x1a,
-        green: 0x2b,
-        blue: 0x3c
-      });
-      assert.isNull(inputHandler.parseAnsiColorChange('17;rgb:a/b/c'));
-      assert.isNull(inputHandler.parseAnsiColorChange('17;rgb:#aabbcc'));
-      assert.isNull(inputHandler.parseAnsiColorChange('17;rgba:aa/bb/cc'));
-      assert.isNull(inputHandler.parseAnsiColorChange('rgb:aa/bb/cc'));
+      // this is testing a private method
+      const parseAnsiColorChange = inputHandler["_parseAnsiColorChange"];
+
+      assert.isNull(parseAnsiColorChange('17;rgb:a/b/c'));
+      assert.isNull(parseAnsiColorChange('17;rgb:#aabbcc'));
+      assert.isNull(parseAnsiColorChange('17;rgba:aa/bb/cc'));
+      assert.isNull(parseAnsiColorChange('rgb:aa/bb/cc'));
     });
     it('should fire event on Ansi color change', (done) => {
       inputHandler.onAnsiColorChange(e => {
diff --git a/src/common/InputHandler.ts b/src/common/InputHandler.ts
index 7867a3fe..3560ee6a 100644
--- a/src/common/InputHandler.ts
+++ b/src/common/InputHandler.ts
@@ -2714,9 +2714,7 @@ export class InputHandler extends Disposable implements IInputHandler {
     this._iconName = data;
   }
 
-  // This is really an internal method and not part of IInputHandler implementation.
-  // Making it public so that I can test it.
-  public parseAnsiColorChange(data: string): IAnsiColorChangeEvent | null {
+  private _parseAnsiColorChange(data: string): IAnsiColorChangeEvent | null {
     // example data: 5;rgb:aa/bb/cc
     const regex = /(\d+);rgb:([0-9a-fA-F]{2})\/([0-9a-fA-F]{2})\/([0-9a-fA-F]{2})/;
     const match = data.match(regex);
@@ -2739,7 +2737,7 @@ export class InputHandler extends Disposable implements IInputHandler {
    * `c` is the color index between 0 and 255. `spec` color format is 'rgb:hh/hh/hh' where `h` are hexadecimal digits.
    */
   public setAnsiColor(data: string): void {
-    const event = this.parseAnsiColorChange(data);
+    const event = this._parseAnsiColorChange(data);
     if (event) {
       this._onAnsiColorChange.fire(event);
     }