diff --git a/application/src/integrationTest/java/de/cotto/lndmanagej/controller/LegacyControllerIT.java b/application/src/integrationTest/java/de/cotto/lndmanagej/controller/LegacyControllerIT.java
index f8d4205b..de503403 100644
--- a/application/src/integrationTest/java/de/cotto/lndmanagej/controller/LegacyControllerIT.java
+++ b/application/src/integrationTest/java/de/cotto/lndmanagej/controller/LegacyControllerIT.java
@@ -14,11 +14,9 @@ import static de.cotto.lndmanagej.model.ChannelIdFixtures.CHANNEL_ID;
 import static de.cotto.lndmanagej.model.ChannelIdFixtures.CHANNEL_ID_3;
 import static de.cotto.lndmanagej.model.NodeFixtures.ALIAS;
 import static de.cotto.lndmanagej.model.PubkeyFixtures.PUBKEY;
-import static org.hamcrest.core.Is.is;
 import static org.mockito.Mockito.when;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
 
 @WebMvcTest(controllers = LegacyController.class)
 class LegacyControllerIT {
@@ -43,7 +41,6 @@ class LegacyControllerIT {
     void getOpenChannelIds() throws Exception {
         when(nodeService.getOpenChannelIds(PUBKEY)).thenReturn(List.of(CHANNEL_ID, CHANNEL_ID_3));
         mockMvc.perform(get("/api/node/" + PUBKEY + "/open-channels"))
-                .andExpect(jsonPath("$[0]", is(CHANNEL_ID.toString())))
-                .andExpect(jsonPath("$[1]", is(CHANNEL_ID_3.toString())));
+                .andExpect(content().string(CHANNEL_ID + "\n" + CHANNEL_ID_3));
     }
 }
\ No newline at end of file
diff --git a/application/src/main/java/de/cotto/lndmanagej/controller/LegacyController.java b/application/src/main/java/de/cotto/lndmanagej/controller/LegacyController.java
index d3c7718d..af0202da 100644
--- a/application/src/main/java/de/cotto/lndmanagej/controller/LegacyController.java
+++ b/application/src/main/java/de/cotto/lndmanagej/controller/LegacyController.java
@@ -8,12 +8,12 @@ import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
-import java.util.List;
 import java.util.stream.Collectors;
 
 @RestController
 @RequestMapping("/api/node/{pubkey}/")
 public class LegacyController {
+    private static final String NEWLINE = "\n";
     private final NodeService nodeService;
 
     public LegacyController(NodeService nodeService) {
@@ -26,9 +26,9 @@ public class LegacyController {
     }
 
     @GetMapping("/open-channels")
-    public List<String> getOpenChannelIds(@PathVariable Pubkey pubkey) {
+    public String getOpenChannelIds(@PathVariable Pubkey pubkey) {
         return nodeService.getOpenChannelIds(pubkey).stream()
                 .map(ChannelId::toString)
-                .collect(Collectors.toList());
+                .collect(Collectors.joining(NEWLINE));
     }
 }
diff --git a/application/src/test/java/de/cotto/lndmanagej/controller/LegacyControllerTest.java b/application/src/test/java/de/cotto/lndmanagej/controller/LegacyControllerTest.java
index acad7639..324867dd 100644
--- a/application/src/test/java/de/cotto/lndmanagej/controller/LegacyControllerTest.java
+++ b/application/src/test/java/de/cotto/lndmanagej/controller/LegacyControllerTest.java
@@ -32,11 +32,9 @@ class LegacyControllerTest {
 
     @Test
     void getOpenChannelIds() {
-        // jq is confused by large numbers, return string instead
         when(nodeService.getOpenChannelIds(PUBKEY)).thenReturn(List.of(CHANNEL_ID, CHANNEL_ID_3));
-        assertThat(legacyController.getOpenChannelIds(PUBKEY)).containsExactly(
-                CHANNEL_ID.toString(),
-                CHANNEL_ID_3.toString()
+        assertThat(legacyController.getOpenChannelIds(PUBKEY)).isEqualTo(
+                CHANNEL_ID + "\n" + CHANNEL_ID_3
         );
     }
 }
\ No newline at end of file