diff --git a/encoding_test.go b/encoding_test.go
index fe8f428..047bcd2 100644
--- a/encoding_test.go
+++ b/encoding_test.go
@@ -291,8 +291,8 @@ var itemEncodingTests = []struct {
 			SS4: map[string]bool{"A": true},
 			SS5: map[customString]struct{}{"A": struct{}{}},
 			SS6: []customString{"A", "B"},
-			SS7: map[textMarshaler]struct{}{textMarshaler(true): struct{}{}, textMarshaler(false): struct{}{}},
-			SS8: map[textMarshaler]bool{textMarshaler(true): true, textMarshaler(false): true},
+			SS7: map[textMarshaler]struct{}{textMarshaler(true): struct{}{}},
+			SS8: map[textMarshaler]bool{textMarshaler(false): true},
 			BS1: [][]byte{[]byte{'A'}, []byte{'B'}},
 			BS2: map[[1]byte]struct{}{[1]byte{'A'}: struct{}{}},
 			BS3: map[[1]byte]bool{[1]byte{'A'}: true},
@@ -309,8 +309,8 @@ var itemEncodingTests = []struct {
 			"SS4": &dynamodb.AttributeValue{SS: []*string{aws.String("A")}},
 			"SS5": &dynamodb.AttributeValue{SS: []*string{aws.String("A")}},
 			"SS6": &dynamodb.AttributeValue{SS: []*string{aws.String("A"), aws.String("B")}},
-			"SS7": &dynamodb.AttributeValue{SS: []*string{aws.String("true"), aws.String("false")}},
-			"SS8": &dynamodb.AttributeValue{SS: []*string{aws.String("true"), aws.String("false")}},
+			"SS7": &dynamodb.AttributeValue{SS: []*string{aws.String("true")}},
+			"SS8": &dynamodb.AttributeValue{SS: []*string{aws.String("false")}},
 			"BS1": &dynamodb.AttributeValue{BS: [][]byte{[]byte{'A'}, []byte{'B'}}},
 			"BS2": &dynamodb.AttributeValue{BS: [][]byte{[]byte{'A'}}},
 			"BS3": &dynamodb.AttributeValue{BS: [][]byte{[]byte{'A'}}},