diff --git a/packages/receipt-components/test/receipt-component.test.ts b/packages/receipt-components/test/receipt-component.test.ts
index 20a4194..e2c8fdf 100644
--- a/packages/receipt-components/test/receipt-component.test.ts
+++ b/packages/receipt-components/test/receipt-component.test.ts
@@ -39,7 +39,7 @@ describe('receipt-component', () => {
       });
 
       it('should use ReceiptComponent.astBuilders in nodeRegistry', () => {
-        ReceiptComponent.registerNode(dummyNodePlugin);
+        ReceiptComponent.registerNodes([dummyNodePlugin]);
         const component = new ReceiptComponent('test', {
           render: () => '',
         });
@@ -90,13 +90,13 @@ describe('receipt-component', () => {
     describe('buildAst', () => {
       it('should build AST from renderTemplate function', () => {
         const render = () => '<root></root>';
-        const component = new ReceiptComponent('test', {
+        const component = new ReceiptComponent<null>('test', {
           render,
         });
-        const ast = component.buildAst({});
+        const ast = component.buildAst(null);
         expect(ast).toEqual({
           name: 'root',
-          props: null,
+          props: {},
           children: [],
         });
       });
@@ -137,21 +137,21 @@ describe('receipt-component', () => {
     });
     it('should register a node', () => {
       ReceiptComponent.registerRenderer(dummyRendererPlugin);
-      ReceiptComponent.registerNode(dummyNodePlugin);
+      ReceiptComponent.registerNodes([dummyNodePlugin]);
       expect(ReceiptComponent.astBuilders.dummyNode).toBe(
         dummyNodePlugin.buildNode
       );
     });
 
     it('should allow registering a node with renderers not defined on instance', () => {
-      ReceiptComponent.registerNode(dummyNodePlugin);
+      ReceiptComponent.registerNodes([dummyNodePlugin]);
       expect(ReceiptComponent.astBuilders.dummyNode).toBe(
         dummyNodePlugin.buildNode
       );
     });
 
     it('should register aliases for a node', () => {
-      ReceiptComponent.registerNode(dummyNodePluginWithAlias);
+      ReceiptComponent.registerNodes([dummyNodePluginWithAlias]);
       expect(ReceiptComponent.astBuilders.dummyNode).toBe(
         dummyNodePluginWithAlias.buildNode
       );
@@ -161,8 +161,8 @@ describe('receipt-component', () => {
     });
 
     it('should allow overriding a node', () => {
-      ReceiptComponent.registerNode(dummyNodePlugin);
-      ReceiptComponent.registerNode(dummyNodePluginWithAlias);
+      ReceiptComponent.registerNodes([dummyNodePlugin]);
+      ReceiptComponent.registerNodes([dummyNodePluginWithAlias]);
       expect(ReceiptComponent.astBuilders.dummyNode).toBe(
         dummyNodePluginWithAlias.buildNode
       );
@@ -170,7 +170,7 @@ describe('receipt-component', () => {
 
     it('should register node renderers to installed renderers', () => {
       ReceiptComponent.registerRenderer(dummyRendererPlugin);
-      ReceiptComponent.registerNode(dummyNodePlugin);
+      ReceiptComponent.registerNodes([dummyNodePlugin]);
       expect(dummyRenderFuncRegistry.dummyNode).toBeDefined();
     });
   });
diff --git a/packages/renderers/receipt-escpos-renderer/test/nodes/align.test.ts b/packages/renderers/receipt-escpos-renderer/test/nodes/align.test.ts
index fd30a70..b64ec4e 100644
--- a/packages/renderers/receipt-escpos-renderer/test/nodes/align.test.ts
+++ b/packages/renderers/receipt-escpos-renderer/test/nodes/align.test.ts
@@ -40,6 +40,7 @@ describe('align', () => {
         bytes.ESC,
         0x61,
         0x00,
+        bytes.LF,
         bytes.ESC,
         0x61,
         0x01,
@@ -60,6 +61,7 @@ describe('align', () => {
         0x61,
         0x01,
         ...childBytes,
+        bytes.LF,
         bytes.ESC,
         0x61,
         0x00,
diff --git a/packages/renderers/receipt-escpos-renderer/test/util/index.test.ts b/packages/renderers/receipt-escpos-renderer/test/util/index.test.ts
index ad6dd0b..9e9b008 100644
--- a/packages/renderers/receipt-escpos-renderer/test/util/index.test.ts
+++ b/packages/renderers/receipt-escpos-renderer/test/util/index.test.ts
@@ -35,13 +35,6 @@ describe('util', () => {
     });
   });
   describe('splitLines', () => {
-    it('should pad spaces to the line length', () => {
-      const text = 'Hello';
-      const lines = splitLines(text, 15, 0).join('\n');
-
-      assert(lines.length === 15);
-    });
-
     it('should split the text into lines', () => {
       const text = 'Hello World';
       const lines = splitLines(text, 5, 0);
@@ -60,38 +53,6 @@ describe('util', () => {
       expect(lines[1]?.trim()).toBe('World');
     });
 
-    it('should pad spaces at the start if justify is right', () => {
-      const text = 'Hello World';
-      const lines = splitLines(text, 15, 0, 'right');
-
-      expect(lines.length).toBe(1);
-      expect(lines[0]).toBe('Hello World'.padStart(15, ' '));
-    });
-
-    it('should pad spaces at the end if justify is left', () => {
-      const text = 'Hello World';
-      const lines = splitLines(text, 15, 0, 'left');
-
-      expect(lines.length).toBe(1);
-      expect(lines[0]).toBe('Hello World'.padEnd(15, ' '));
-    });
-
-    it('should pad spaces at the start and end if justify is center', () => {
-      const text = 'Hello World';
-      const lines = splitLines(text, 15, 0, 'center');
-
-      expect(lines.length).toBe(1);
-      expect(lines[0]).toBe('Hello World'.padStart(13, ' ').padEnd(12, ' '));
-    });
-
-    it('should have extra spaces at the end if justify is center and the line length is odd', () => {
-      const text = 'Hello World';
-      const lines = splitLines(text, 14, 0, 'center');
-
-      expect(lines.length).toBe(1);
-      expect(lines[0]).toBe('Hello World'.padStart(12, ' ').padEnd(13, ' '));
-    });
-
     it('should split text when word lengths equal line length', () => {
       const text = 'Hello World';
       const lines = splitLines(text, 10, 0);
@@ -108,14 +69,5 @@ describe('util', () => {
       expect(lines.length).toBe(1);
       expect(lines[0]?.trim()).toBe('Hello World');
     });
-
-    it('should justify every line', () => {
-      const text = 'Hello World';
-      const lines = splitLines(text, 10, 0);
-
-      expect(lines.length).toBe(2);
-      expect(lines[0]).toBe('Hello'.padEnd(10, ' '));
-      expect(lines[1]).toBe('World'.padEnd(10, ' '));
-    });
   });
 });