diff --git a/poa/candidates_test.go b/poa/candidates_test.go
new file mode 100644
index 000000000..b71ad26c0
--- /dev/null
+++ b/poa/candidates_test.go
@@ -0,0 +1,139 @@
+// Copyright (c) 2024 The VeChainThor developers
+
+// Distributed under the GNU Lesser General Public License v3.0 software license, see the accompanying
+// file LICENSE or <https://www.gnu.org/licenses/lgpl-3.0.html>
+
+package poa
+
+import (
+	"crypto/rand"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vechain/thor/v2/builtin/authority"
+	"github.com/vechain/thor/v2/muxdb"
+	"github.com/vechain/thor/v2/state"
+	"github.com/vechain/thor/v2/thor"
+)
+
+func generateCandidateList(candidateCount int) []*authority.Candidate {
+
+	candidateList := make([]*authority.Candidate, 0, candidateCount)
+	for i := 0; i < candidateCount; i++ {
+		var nodeMaster, endorsor thor.Address
+		var identity thor.Bytes32
+
+		rand.Read(nodeMaster[:])
+		rand.Read(endorsor[:])
+		rand.Read(identity[:])
+
+		candidateList = append(candidateList, &authority.Candidate{
+			NodeMaster: nodeMaster,
+			Endorsor:   endorsor,
+			Identity:   identity,
+			Active:     true,
+		})
+	}
+
+	return candidateList
+}
+
+func TestNewCandidates(t *testing.T) {
+
+	candidateList := generateCandidateList(5)
+
+	// Call NewCandidates with the mock data
+	candidates := NewCandidates(candidateList)
+
+	// Check if the candidates object is correctly initialized
+	assert.NotNil(t, candidates)
+	assert.Equal(t, len(candidateList), len(candidates.list))
+
+	// Check the internal maps (masters and endorsors)
+	for _, candidate := range candidateList {
+		_, exists := candidates.masters[candidate.NodeMaster]
+		assert.True(t, exists, "NodeMaster should exist in masters map")
+
+		_, exists = candidates.endorsors[candidate.Endorsor]
+		assert.True(t, exists, "Endorsor should exist in endorsors map")
+
+		assert.Nil(t, candidates.satisfied, "Satisfied must be nil")
+
+		assert.False(t, candidates.referenced, "Referenced must be false")
+	}
+}
+
+func TestCopy(t *testing.T) {
+	// Create a mock candidate
+	var nodeMaster, endorsor thor.Address
+	var identity thor.Bytes32
+
+	rand.Read(nodeMaster[:])
+	rand.Read(endorsor[:])
+	rand.Read(identity[:])
+
+	candidate := &authority.Candidate{
+		NodeMaster: nodeMaster,
+		Endorsor:   endorsor,
+		Identity:   identity,
+		Active:     true,
+	}
+
+	originalCandidates := NewCandidates([]*authority.Candidate{candidate})
+
+	// Call the Copy method
+	copiedCandidates := originalCandidates.Copy()
+
+	// Check that the original and the copy are not the same instance
+	assert.NotSame(t, originalCandidates, copiedCandidates, "Original and copied instances should not be the same")
+
+	// Check that the internal state of the original and the copy are equivalent
+	assert.Equal(t, originalCandidates.list, copiedCandidates.list, "The candidate lists of the original and the copy should be equal")
+	assert.Equal(t, originalCandidates.masters, copiedCandidates.masters, "The masters maps of the original and the copy should be equal")
+	assert.Equal(t, originalCandidates.endorsors, copiedCandidates.endorsors, "The endorsors maps of the original and the copy should be equal")
+	assert.Equal(t, originalCandidates.satisfied, copiedCandidates.satisfied, "The satisfied list of the original and the copy should be equal")
+	assert.Equal(t, originalCandidates.referenced, copiedCandidates.referenced, "The referenced state of the original and the copy should be equal")
+
+	// Modify the copy and check that the original remains unchanged
+	var newEndorsor thor.Address
+	rand.Read(newEndorsor[:])
+	copiedCandidates.endorsors[newEndorsor] = true
+
+	_, existsInOriginal := originalCandidates.endorsors[newEndorsor]
+	assert.True(t, existsInOriginal, "Modifying the copy should affect the original")
+	assert.True(t, originalCandidates.referenced, "After copy, referenced must be true")
+}
+
+func TestPick(t *testing.T) {
+	db := muxdb.NewMem()
+	state := state.New(db, thor.Bytes32{}, 0, 0, 0)
+
+	candidateList := generateCandidateList(5)
+
+	// Call NewCandidates with the mock data
+	candidates := NewCandidates(candidateList)
+
+	proposers, err := candidates.Pick(state)
+
+	assert.NoError(t, err)
+
+	for i, proposer := range proposers {
+		assert.Equal(t, proposer.Address, candidateList[i].NodeMaster, "NodeMaster must be contained in proposer")
+		assert.Equal(t, proposer.Active, candidateList[i].Active, "NodeMaster must be active")
+	}
+}
+
+func TestUpdate(t *testing.T) {
+
+	candidateList := generateCandidateList(5)
+
+	// Call NewCandidates with the mock data
+	candidates := NewCandidates(candidateList)
+
+	assert.True(t, candidates.Update(candidateList[0].NodeMaster, false), "Should return True")
+
+	var newNodeMaster thor.Address
+	rand.Read(newNodeMaster[:])
+
+	assert.False(t, candidates.Update(newNodeMaster, false), "Should return false")
+}