diff --git a/lexical/slowsort_test.go b/lexical/slowsort_test.go
new file mode 100644
index 0000000..20e1a3c
--- /dev/null
+++ b/lexical/slowsort_test.go
@@ -0,0 +1,19 @@
+package lexical
+
+import "testing"
+
+// TestSlowSort tests the SlowSort func.
+func TestSlowSort(t *testing.T) {
+	words := make(map[string]string)
+
+	words["dcba"] = "abcd"
+	words["zyx"] = "xyz"
+
+	for word, sorted := range words {
+		s := SlowSort(word)
+		if s != sorted {
+			t.Errorf("Sort func failed, got %s, want %s",
+				s, sorted)
+		}
+	}
+}
diff --git a/lexical/sort_test.go b/lexical/sort_test.go
new file mode 100644
index 0000000..c4a823e
--- /dev/null
+++ b/lexical/sort_test.go
@@ -0,0 +1,19 @@
+package lexical
+
+import "testing"
+
+// TestSort tests the Sort func.
+func TestSort(t *testing.T) {
+	words := make(map[string]string)
+
+	words["dcba"] = "abcd"
+	words["zyx"] = "xyz"
+
+	for word, sorted := range words {
+		s := Sort(word)
+		if s != sorted {
+			t.Errorf("Sort func failed, got %s, want %s",
+				s, sorted)
+		}
+	}
+}