diff --git a/.changeset/tricky-points-smell.md b/.changeset/tricky-points-smell.md
new file mode 100644
index 00000000..de39416e
--- /dev/null
+++ b/.changeset/tricky-points-smell.md
@@ -0,0 +1,5 @@
+---
+"@balancer/sdk": patch
+---
+
+fix: nested single token remove v2 validation
diff --git a/src/entities/utils/isPoolToken.ts b/src/entities/utils/isPoolToken.ts
index ff1ebc25..fa2ede54 100644
--- a/src/entities/utils/isPoolToken.ts
+++ b/src/entities/utils/isPoolToken.ts
@@ -26,7 +26,7 @@ export function isPoolToken(
         const isToken = isSameAddress(t.address, token);
         const isUnderlying =
             isPoolTokenWithUnderlying(t) &&
-            t.underlyingToken &&
+            t.underlyingToken?.address &&
             isSameAddress(t.underlyingToken.address, token);
 
         if (isToken || isUnderlying) {
diff --git a/test/nestedPoolStateValidation.test.ts b/src/entities/utils/validateNestedPoolState.test.ts
similarity index 97%
rename from test/nestedPoolStateValidation.test.ts
rename to src/entities/utils/validateNestedPoolState.test.ts
index ca06850b..cf3e2d62 100644
--- a/test/nestedPoolStateValidation.test.ts
+++ b/src/entities/utils/validateNestedPoolState.test.ts
@@ -1,10 +1,6 @@
 // pnpm test -- nestedPoolStateValidation.test.ts
 import { describe, expect, test } from 'vitest';
-import {
-    NestedPoolState,
-    NestedPoolV2,
-    validateNestedPoolState,
-} from '../src/entities';
+import { NestedPoolState, NestedPoolV2, validateNestedPoolState } from '..';
 import { PoolType } from '@/types';
 
 describe('nested pool state validations', () => {
@@ -45,7 +41,7 @@ describe('nested pool state validations', () => {
                         TOP
                 3POOL_BPT/auraBal_BPT/WETH
 
-        3POOL_BPT           auraBal_BPT         
+        3POOL_BPT           auraBal_BPT
         DAI/USDC/USDT       auraBal/8020_BPT
 
                                 8020_BPT