diff --git a/tests/simple/testdata/string_ext.textproto b/tests/simple/testdata/string_ext.textproto
index c73ee685..d2455583 100644
--- a/tests/simple/testdata/string_ext.textproto
+++ b/tests/simple/testdata/string_ext.textproto
@@ -655,7 +655,7 @@ section: {
   }
   test: {
     name: "list support for string"
-    expr: '"%s".format([[abc, 3.14, null, [9, 8, 7, 6], timestamp("2023-02-03T23:31:20Z")]])'
+    expr: '"%s".format([["abc", 3.14, null, [9, 8, 7, 6], timestamp("2023-02-03T23:31:20Z")]])'
     value: {
       string_value: '[abc, 3.14, null, [9, 8, 7, 6], 2023-02-03T23:31:20Z]',
     }
@@ -745,8 +745,8 @@ section: {
     }
   }
   test: {
-    name: "dyntype NaN/infinity support for fixed-point"
-    expr: '"%s".format([double("NaN"), double("Infinity"), double("-Infinity")])'
+    name: "dyntype NaN/infinity support"
+    expr: '"%s".format([[double("NaN"), double("Infinity"), double("-Infinity")]])'
     value: {
       string_value: '[NaN, Infinity, -Infinity]',
     }