diff --git a/store/store_test.go b/store/store_test.go
index 358aae2..6955bc1 100644
--- a/store/store_test.go
+++ b/store/store_test.go
@@ -541,3 +541,37 @@ func TestPebbleStore_TransferTransactions(t *testing.T) {
 	_, err = store.GetTransferTransactionsPerTick(ctx, idOne, 14)
 	require.EqualError(t, err, ErrNotFound.Error())
 }
+
+func TestPebbleStore_QChainHash(t *testing.T) {
+	ctx := context.Background()
+
+	// Setup test environment
+	dbDir, err := os.MkdirTemp("", "pebble_test")
+	require.NoError(t, err)
+	defer os.RemoveAll(dbDir)
+
+	db, err := pebble.Open(filepath.Join(dbDir, "testdb"), &pebble.Options{})
+	require.NoError(t, err)
+	defer db.Close()
+
+	logger, _ := zap.NewDevelopment()
+	store := NewPebbleStore(db, logger)
+
+	// Sample QChainHash for testing
+	tickNumber := uint64(12795005)
+	qChainHash := []byte("qChainHash")
+
+	// Set QChainHash
+	err = store.PutQChainDigest(ctx, tickNumber, qChainHash)
+	require.NoError(t, err)
+
+	// Get QChainHash
+	retrievedQChainHash, err := store.GetQChainDigest(ctx, tickNumber)
+	require.NoError(t, err)
+	require.Equal(t, qChainHash, retrievedQChainHash)
+
+	// Test retrieval of non-existent QChainHash
+	_, err = store.GetQChainDigest(ctx, 999) // Assuming 999 is a tick number that wasn't stored
+	require.Error(t, err)
+	require.Equal(t, ErrNotFound, err)
+}
diff --git a/validator/qchain/qchain_test.go b/validator/qchain/qchain_test.go
new file mode 100644
index 0000000..187d21b
--- /dev/null
+++ b/validator/qchain/qchain_test.go
@@ -0,0 +1,28 @@
+package qchain
+
+import (
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestQChain_Digest(t *testing.T) {
+	qChain := QChain{
+		ComputorIndex:                 1,
+		Epoch:                         20,
+		Tick:                          30,
+		Millisecond:                   40,
+		Second:                        50,
+		Minute:                        60,
+		Hour:                          70,
+		Day:                           80,
+		Month:                         90,
+		Year:                          10,
+		PreviousResourceTestingDigest: 13423432,
+		PreviousSpectrumDigest:        [32]byte{},
+		PreviousUniverseDigest:        [32]byte{},
+		PreviousComputerDigest:        [32]byte{},
+		TxDigest:                      [32]byte{},
+	}
+	_, err := qChain.Digest()
+	require.NoError(t, err)
+}