diff --git a/mathutil/mathutil_test.go b/mathutil/mathutil_test.go
index 3d93bf4..5e5da0d 100644
--- a/mathutil/mathutil_test.go
+++ b/mathutil/mathutil_test.go
@@ -119,18 +119,18 @@ func TestMin(t *testing.T) {
 func TestMinBy(t *testing.T) {
 	assert := internal.NewAssert(t, "TestMinBy")
 
-	res1 := MaxBy([]string{"a", "ab", "abc"}, func(v1, v2 string) bool {
+	res1 := MinBy([]string{"a", "ab", "abc"}, func(v1, v2 string) bool {
 		return len(v1) < len(v2)
 	})
 	assert.Equal("a", res1)
 
-	res2 := MaxBy([]string{"ab", "ac", "abc"}, func(v1, v2 string) bool {
+	res2 := MinBy([]string{"ab", "ac", "abc"}, func(v1, v2 string) bool {
 		return len(v1) < len(v2)
 	})
 	assert.Equal("ab", res2)
 
-	res3 := MaxBy([]string{}, func(v1, v2 string) bool {
-		return len(v1) > len(v2)
+	res3 := MinBy([]string{}, func(v1, v2 string) bool {
+		return len(v1) < len(v2)
 	})
 	assert.Equal("", res3)
-}
\ No newline at end of file
+}