diff --git a/test/interpolation/completion/helper.ts b/test/interpolation/completion/helper.ts
index b8c167afad..9ee68cbdb1 100644
--- a/test/interpolation/completion/helper.ts
+++ b/test/interpolation/completion/helper.ts
@@ -30,7 +30,7 @@ export async function testCompletion(
     } else {
       const match = result.items.find(i => i.label === ei.label);
       if (!match) {
-        assert.fail(`Can't find matching item for ${JSON.stringify(ei, null, 2)}`);
+        assert.fail(`Can't find matching item for\n${JSON.stringify(ei, null, 2)}`);
         return;
       }
 
diff --git a/test/lsp/completion/helper.ts b/test/lsp/completion/helper.ts
index 9ea15d77b8..2cdf4b16d0 100644
--- a/test/lsp/completion/helper.ts
+++ b/test/lsp/completion/helper.ts
@@ -30,7 +30,7 @@ export async function testCompletion(
     } else {
       const match = result.items.find(i => i.label === ei.label);
       if (!match) {
-        assert.fail(`Can't find matching item for ${JSON.stringify(ei, null, 2)}`);
+        assert.fail(`Can't find matching item for\n${JSON.stringify(ei, null, 2)}`);
         return;
       }
 
diff --git a/test/vue3/completion/helper.ts b/test/vue3/completion/helper.ts
index b8c167afad..9ee68cbdb1 100644
--- a/test/vue3/completion/helper.ts
+++ b/test/vue3/completion/helper.ts
@@ -30,7 +30,7 @@ export async function testCompletion(
     } else {
       const match = result.items.find(i => i.label === ei.label);
       if (!match) {
-        assert.fail(`Can't find matching item for ${JSON.stringify(ei, null, 2)}`);
+        assert.fail(`Can't find matching item for\n${JSON.stringify(ei, null, 2)}`);
         return;
       }