1 files changed, 7 insertions, 4 deletions
diff --git a/packages/0x.js/test/ether_token_wrapper_test.ts b/packages/0x.js/test/ether_token_wrapper_test.ts
index da49ec467..72086dff0 100644
--- a/packages/0x.js/test/ether_token_wrapper_test.ts
+++ b/packages/0x.js/test/ether_token_wrapper_test.ts
@@ -75,11 +75,14 @@ describe('EtherTokenWrapper', () => {
             const contractAddressIfExists = zeroEx.etherToken.getContractAddressIfExists();
             expect(contractAddressIfExists).to.not.be.undefined();
         });
-        it('should return undefined if connected to an unknown network', () => {
+        it('should throw if connected to a private network and contract addresses are not specified', () => {
             const UNKNOWN_NETWORK_NETWORK_ID = 10;
-            const unknownNetworkZeroEx = new ZeroEx(web3.currentProvider, { networkId: UNKNOWN_NETWORK_NETWORK_ID });
-            const contractAddressIfExists = unknownNetworkZeroEx.etherToken.getContractAddressIfExists();
-            expect(contractAddressIfExists).to.be.undefined();
+            expect(
+                () =>
+                    new ZeroEx(web3.currentProvider, {
+                        networkId: UNKNOWN_NETWORK_NETWORK_ID,
+                    } as any),
+            ).to.throw();
         });
     });
     describe('#depositAsync', () => {