diff --git a/conformance/failure_list_jruby.txt b/conformance/failure_list_jruby.txt
index 2fb4dc881f..c0d29804fe 100644
--- a/conformance/failure_list_jruby.txt
+++ b/conformance/failure_list_jruby.txt
@@ -1,2 +1,38 @@
-Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInMapValue.ProtobufOutput
-Recommended.Proto3.JsonInput.IgnoreUnknownEnumStringValueInRepeatedField.ProtobufOutput
+Recommended.FieldMaskNumbersDontRoundTrip.JsonOutput
+Recommended.FieldMaskPathsDontRoundTrip.JsonOutput
+Recommended.FieldMaskTooManyUnderscore.JsonOutput
+Recommended.Proto2.JsonInput.FieldNameExtension.Validator
+Recommended.Proto3.JsonInput.BoolFieldAllCapitalFalse
+Recommended.Proto3.JsonInput.BoolFieldAllCapitalTrue
+Recommended.Proto3.JsonInput.BoolFieldCamelCaseFalse
+Recommended.Proto3.JsonInput.BoolFieldCamelCaseTrue
+Recommended.Proto3.JsonInput.BoolFieldDoubleQuotedFalse
+Recommended.Proto3.JsonInput.BoolFieldDoubleQuotedTrue
+Recommended.Proto3.JsonInput.BoolMapFieldKeyNotQuoted
+Recommended.Proto3.JsonInput.DoubleFieldInfinityNotQuoted
+Recommended.Proto3.JsonInput.DoubleFieldNanNotQuoted
+Recommended.Proto3.JsonInput.DoubleFieldNegativeInfinityNotQuoted
+Recommended.Proto3.JsonInput.FieldMaskInvalidCharacter
+Recommended.Proto3.JsonInput.FieldNameDuplicate
+Recommended.Proto3.JsonInput.FieldNameNotQuoted
+Recommended.Proto3.JsonInput.FloatFieldInfinityNotQuoted
+Recommended.Proto3.JsonInput.FloatFieldNanNotQuoted
+Recommended.Proto3.JsonInput.FloatFieldNegativeInfinityNotQuoted
+Recommended.Proto3.JsonInput.Int32MapFieldKeyNotQuoted
+Recommended.Proto3.JsonInput.Int64MapFieldKeyNotQuoted
+Recommended.Proto3.JsonInput.JsonWithComments
+Recommended.Proto3.JsonInput.StringFieldSingleQuoteBoth
+Recommended.Proto3.JsonInput.StringFieldSingleQuoteKey
+Recommended.Proto3.JsonInput.StringFieldSingleQuoteValue
+Recommended.Proto3.JsonInput.StringFieldSurrogateInWrongOrder
+Recommended.Proto3.JsonInput.StringFieldUnpairedHighSurrogate
+Recommended.Proto3.JsonInput.StringFieldUnpairedLowSurrogate
+Recommended.Proto3.JsonInput.Uint32MapFieldKeyNotQuoted
+Recommended.Proto3.JsonInput.Uint64MapFieldKeyNotQuoted
+Required.Proto3.JsonInput.EnumFieldNotQuoted
+Required.Proto3.JsonInput.Int32FieldLeadingZero
+Required.Proto3.JsonInput.Int32FieldNegativeWithLeadingZero
+Required.Proto3.JsonInput.Int32FieldPlusSign
+Required.Proto3.JsonInput.RepeatedFieldWrongElementTypeExpectingStringsGotBool
+Required.Proto3.JsonInput.RepeatedFieldWrongElementTypeExpectingStringsGotInt
+Required.Proto3.JsonInput.StringFieldNotAString
diff --git a/ruby/src/main/java/com/google/protobuf/jruby/Utils.java b/ruby/src/main/java/com/google/protobuf/jruby/Utils.java
index 65de683b02..2c141457f4 100644
--- a/ruby/src/main/java/com/google/protobuf/jruby/Utils.java
+++ b/ruby/src/main/java/com/google/protobuf/jruby/Utils.java
@@ -40,6 +40,7 @@ import org.jcodings.specific.ASCIIEncoding;
 import org.jruby.*;
 import org.jruby.exceptions.RaiseException;
 import org.jruby.ext.bigdecimal.RubyBigDecimal;
+import org.jruby.util.ByteList;
 import org.jruby.runtime.Block;
 import org.jruby.runtime.Helpers;
 import org.jruby.runtime.ThreadContext;
@@ -263,7 +264,7 @@ public class Utils {
           IRubyObject wrapped =
               encodeBytes
                   ? RubyString.newString(
-                      runtime, ((ByteString) value).toStringUtf8(), ASCIIEncoding.INSTANCE)
+                      runtime, new ByteList(((ByteString) value).toByteArray()), ASCIIEncoding.INSTANCE)
                   : RubyString.newString(runtime, ((ByteString) value).toByteArray());
           wrapped.setFrozen(true);
           return wrapped;