diff --git a/amount_test.go b/amount_test.go
index 57fac75..148dc02 100644
--- a/amount_test.go
+++ b/amount_test.go
@@ -865,6 +865,14 @@ func TestAmount_UnmarshalJSON(t *testing.T) {
 	if unmarshalled.CurrencyCode() != "USD" {
 		t.Errorf("got %v, want USD", unmarshalled.CurrencyCode())
 	}
+
+	d = []byte(`{'break_please'}`)
+	amount := &currency.Amount{}
+	err = amount.UnmarshalJSON(d)
+	if err == nil {
+		t.Errorf("error expected")
+	}
+
 }
 
 func TestAmount_Value(t *testing.T) {
diff --git a/currency_test.go b/currency_test.go
index be5a02b..0025528 100644
--- a/currency_test.go
+++ b/currency_test.go
@@ -120,6 +120,7 @@ func TestGetSymbol(t *testing.T) {
 		{"USD", currency.NewLocale("en-AU"), "US$", true},
 		{"USD", currency.NewLocale("es"), "US$", true},
 		{"USD", currency.NewLocale("es-ES"), "US$", true},
+		{"USD", currency.NewLocale(""), "", true},
 	}
 
 	for _, tt := range tests {
diff --git a/formatter_test.go b/formatter_test.go
index 04f1ff9..fc510b8 100644
--- a/formatter_test.go
+++ b/formatter_test.go
@@ -381,3 +381,12 @@ func TestFormatter_Parse(t *testing.T) {
 		})
 	}
 }
+
+func TestEmptyLocale(t *testing.T) {
+	locale := currency.NewLocale("")
+	formatter := currency.NewFormatter(locale)
+	got := formatter.Locale().String()
+	if got != "" {
+		t.Errorf("got %v, want empty locale", got)
+	}
+}