diff --git a/ff_test.go b/ff_test.go
new file mode 100644
index 0000000..9b0b05e
--- /dev/null
+++ b/ff_test.go
@@ -0,0 +1,28 @@
+package arbo
+
+import (
+	"math/big"
+	"testing"
+)
+
+func TestBigToFF(t *testing.T) {
+	baseField := BN254BaseField
+	iv := new(big.Int).Sub(baseField, big.NewInt(1))
+	// test with iv < baseField (the result should be iv)
+	z := BigToFF(baseField, iv)
+	if z.Cmp(iv) != 0 {
+		t.Fatalf("BigToFF failed: %v != %v", z, iv)
+	}
+	// test with iv > baseField (the result should be iv % baseField)
+	iv = new(big.Int).Add(baseField, big.NewInt(1))
+	z = BigToFF(baseField, iv)
+	if z.Cmp(big.NewInt(1)) != 0 {
+		t.Fatalf("BigToFF failed: %v != 0", z)
+	}
+	// test with iv == baseField (the result should be 0)
+	iv = baseField
+	z = BigToFF(baseField, iv)
+	if z.Cmp(big.NewInt(0)) != 0 {
+		t.Fatalf("BigToFF failed: %v != 0", z)
+	}
+}
diff --git a/hash_test.go b/hash_test.go
index da0d629..43aec20 100644
--- a/hash_test.go
+++ b/hash_test.go
@@ -53,3 +53,17 @@ func TestHashBlake2b(t *testing.T) {
 		qt.Equals,
 		"928b20366943e2afd11ebc0eae2e53a93bf177a4fcf35bcc64d503704e65e202")
 }
+
+func TestHashMiMC(t *testing.T) {
+	// MiMC hash
+	HashFunction := &HashMiMC_BLS12_377{}
+	b := []byte("test")
+	h, err := HashFunction.Hash(b)
+	if err != nil {
+		t.Fatal(err)
+	}
+	c := qt.New(t)
+	c.Assert(hex.EncodeToString(h),
+		qt.Equals,
+		"f881f34991492d823e02565c778b824bac5eacef6340b70ee90a8966a2e63900")
+}