diff --git a/src/main/java/com/google/api/generator/gapic/protoparser/HttpRuleParser.java b/src/main/java/com/google/api/generator/gapic/protoparser/HttpRuleParser.java
index b55aaa263a..488bc52cea 100644
--- a/src/main/java/com/google/api/generator/gapic/protoparser/HttpRuleParser.java
+++ b/src/main/java/com/google/api/generator/gapic/protoparser/HttpRuleParser.java
@@ -130,11 +130,8 @@ private static void checkHttpFieldIsValid(String binding, Message inputMessage,
     Preconditions.checkState(
         inputMessage.fieldMap().containsKey(binding),
         String.format(
-            "Expected message %s to contain field %s but none found"
-                + ", DEL: "
-                + inputMessage.fieldMap().keySet(),
-            inputMessage.name(),
-            binding));
+            "Expected message %s to contain field %s but none found",
+            inputMessage.name(), binding));
     Field field = inputMessage.fieldMap().get(binding);
     boolean fieldCondition = !field.isRepeated();
     if (!isBody) {
diff --git a/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java b/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java
index 832420374d..f2811a2e4d 100644
--- a/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java
+++ b/src/main/java/com/google/api/generator/gapic/protoparser/Parser.java
@@ -569,9 +569,8 @@ static LongrunningOperation parseLro(
     Preconditions.checkNotNull(
         metadataMessage,
         String.format(
-            "LRO metadata message %s not found in method %s" + ", DEL: " + messageTypes.keySet(),
-            metadataTypeName,
-            methodDescriptor.getName()));
+            "LRO metadata message %s not found in method %s",
+            metadataTypeName, methodDescriptor.getName()));
 
     return LongrunningOperation.withTypes(responseMessage.type(), metadataMessage.type());
   }