diff --git a/src/components/node/NodePreview.spec.ts b/src/components/node/NodePreview.spec.ts
new file mode 100644
index 000000000..d7536b045
--- /dev/null
+++ b/src/components/node/NodePreview.spec.ts
@@ -0,0 +1,132 @@
+import { mount } from '@vue/test-utils'
+import { createPinia } from 'pinia'
+import PrimeVue from 'primevue/config'
+import { beforeAll, describe, expect, it } from 'vitest'
+import { createApp } from 'vue'
+import { createI18n } from 'vue-i18n'
+
+import type { ComfyNodeDef as ComfyNodeDefV2 } from '@/schemas/nodeDef/nodeDefSchemaV2'
+
+import NodePreview from './NodePreview.vue'
+
+describe('NodePreview', () => {
+  let i18n: ReturnType<typeof createI18n>
+  let pinia: ReturnType<typeof createPinia>
+
+  beforeAll(() => {
+    // Create a Vue app instance for PrimeVue
+    const app = createApp({})
+    app.use(PrimeVue)
+
+    // Create i18n instance
+    i18n = createI18n({
+      legacy: false,
+      locale: 'en',
+      messages: {
+        en: {
+          g: {
+            preview: 'Preview'
+          }
+        }
+      }
+    })
+
+    // Create pinia instance
+    pinia = createPinia()
+  })
+
+  const mockNodeDef: ComfyNodeDefV2 = {
+    name: 'TestNode',
+    display_name:
+      'Test Node With A Very Long Display Name That Should Overflow',
+    category: 'test',
+    output_node: false,
+    inputs: {
+      test_input: {
+        name: 'test_input',
+        type: 'STRING',
+        tooltip: 'Test input'
+      }
+    },
+    outputs: [],
+    python_module: 'test_module',
+    description: 'Test node description'
+  }
+
+  const mountComponent = (nodeDef: ComfyNodeDefV2 = mockNodeDef) => {
+    return mount(NodePreview, {
+      global: {
+        plugins: [PrimeVue, i18n, pinia],
+        stubs: {
+          // Stub stores if needed
+        }
+      },
+      props: {
+        nodeDef
+      }
+    })
+  }
+
+  it('renders node preview with correct structure', () => {
+    const wrapper = mountComponent()
+
+    expect(wrapper.find('._sb_node_preview').exists()).toBe(true)
+    expect(wrapper.find('.node_header').exists()).toBe(true)
+    expect(wrapper.find('._sb_preview_badge').text()).toBe('Preview')
+  })
+
+  it('applies overflow-ellipsis class to node header for text truncation', () => {
+    const wrapper = mountComponent()
+    const nodeHeader = wrapper.find('.node_header')
+
+    expect(nodeHeader.classes()).toContain('overflow-ellipsis')
+    expect(nodeHeader.classes()).toContain('mr-4')
+  })
+
+  it('sets title attribute on node header with full display name', () => {
+    const wrapper = mountComponent()
+    const nodeHeader = wrapper.find('.node_header')
+
+    expect(nodeHeader.attributes('title')).toBe(mockNodeDef.display_name)
+  })
+
+  it('displays truncated long node names with ellipsis', () => {
+    const longNameNodeDef: ComfyNodeDefV2 = {
+      ...mockNodeDef,
+      display_name:
+        'This Is An Extremely Long Node Name That Should Definitely Be Truncated With Ellipsis To Prevent Layout Issues'
+    }
+
+    const wrapper = mountComponent(longNameNodeDef)
+    const nodeHeader = wrapper.find('.node_header')
+
+    // Verify the title attribute contains the full name
+    expect(nodeHeader.attributes('title')).toBe(longNameNodeDef.display_name)
+
+    // Verify overflow handling classes are applied
+    expect(nodeHeader.classes()).toContain('overflow-ellipsis')
+
+    // The actual text content should still be the full name (CSS handles truncation)
+    expect(nodeHeader.text()).toContain(longNameNodeDef.display_name)
+  })
+
+  it('handles short node names without issues', () => {
+    const shortNameNodeDef: ComfyNodeDefV2 = {
+      ...mockNodeDef,
+      display_name: 'Short'
+    }
+
+    const wrapper = mountComponent(shortNameNodeDef)
+    const nodeHeader = wrapper.find('.node_header')
+
+    expect(nodeHeader.attributes('title')).toBe('Short')
+    expect(nodeHeader.text()).toContain('Short')
+  })
+
+  it('applies proper spacing to the dot element', () => {
+    const wrapper = mountComponent()
+    const headdot = wrapper.find('.headdot')
+
+    expect(headdot.classes()).toContain('pr-3')
+  })
+})
diff --git a/src/components/node/NodePreview.vue b/src/components/node/NodePreview.vue
index 475016409..afe1f00fe 100644
--- a/src/components/node/NodePreview.vue
+++ b/src/components/node/NodePreview.vue
@@ -6,13 +6,14 @@ https://github.com/Nuked88/ComfyUI-N-Sidebar/blob/7ae7da4a9761009fb6629bc04c6830
   <div class="_sb_node_preview">
     <div class="_sb_table">
       <div
-        class="node_header"
+        class="node_header overflow-ellipsis mr-4"
+        :title="nodeDef.display_name"
         :style="{
           backgroundColor: litegraphColors.NODE_DEFAULT_COLOR,
           color: litegraphColors.NODE_TITLE_COLOR
         }"
       >
-        <div class="_sb_dot headdot" />
+        <div class="_sb_dot headdot pr-3" />
         {{ nodeDef.display_name }}
       </div>
       <div class="_sb_preview_badge">{{ $t('g.preview') }}</div>