diff --git a/test/utils/mcpPath.test.ts b/test/utils/mcpPath.test.ts
new file mode 100644
index 0000000..31a5b85
--- /dev/null
+++ b/test/utils/mcpPath.test.ts
@@ -0,0 +1,48 @@
+import { normalizeMcpPath, getCompatibleMcpPaths } from '../../src/utils/mcpPath'
+
+describe('normalizeMcpPath', () => {
+  it('returns default "/" when value is undefined', () => {
+    expect(normalizeMcpPath(undefined)).toBe('/')
+  })
+
+  it('returns default "/" when value is empty string', () => {
+    expect(normalizeMcpPath('')).toBe('/')
+  })
+
+  it('returns default "/" when value is whitespace', () => {
+    expect(normalizeMcpPath('   ')).toBe('/')
+  })
+
+  it('preserves value that starts with /', () => {
+    expect(normalizeMcpPath('/custom')).toBe('/custom')
+  })
+
+  it('prepends / when value does not start with /', () => {
+    expect(normalizeMcpPath('custom')).toBe('/custom')
+  })
+
+  it('trims whitespace from value', () => {
+    expect(normalizeMcpPath('  /path  ')).toBe('/path')
+  })
+
+  it('uses custom default when value is empty', () => {
+    expect(normalizeMcpPath(undefined, '/alt')).toBe('/alt')
+  })
+})
+
+describe('getCompatibleMcpPaths', () => {
+  it('returns both "/" and "/mcp" for root path', () => {
+    const paths = getCompatibleMcpPaths('/')
+    expect(paths).toEqual(new Set(['/', '/mcp']))
+  })
+
+  it('returns both "/" and "/mcp" for /mcp path', () => {
+    const paths = getCompatibleMcpPaths('/mcp')
+    expect(paths).toEqual(new Set(['/', '/mcp']))
+  })
+
+  it('returns only the configured path for custom paths', () => {
+    const paths = getCompatibleMcpPaths('/custom')
+    expect(paths).toEqual(new Set(['/custom']))
+  })
+})