diff --git a/state/state_test.go b/state/state_test.go
index 04170232..cf3272f1 100644
--- a/state/state_test.go
+++ b/state/state_test.go
@@ -492,6 +492,11 @@ func (helm *mockHelmExec) UpdateRepo() error {
 	return nil
 }
 func (helm *mockHelmExec) SyncRelease(name, chart string, flags ...string) error {
+	if strings.Contains(name, "error") {
+		return errors.New("error")
+	}
+	helm.releases = append(helm.releases, name)
+	helm.charts = append(helm.charts, chart)
 	return nil
 }
 func (helm *mockHelmExec) DiffRelease(name, chart string, flags ...string) error {
@@ -564,6 +569,38 @@ func TestHelmState_SyncRepos(t *testing.T) {
 	}
 }
 
+
+func TestHelmState_SyncReleases(t *testing.T) {
+	tests := []struct {
+		name  	      string
+		releases     []ReleaseSpec
+		helm         *mockHelmExec
+		wantReleases []string
+	}{
+		{
+			name: "normal release",
+			releases: []ReleaseSpec{
+				{
+					Name:     "releaseName",
+					Chart:    "foo",
+				},
+			},
+			helm: &mockHelmExec{},
+			wantReleases: []string{"releaseName"},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			state := &HelmState{
+				Releases: tt.releases,
+			}
+			if _ = state.SyncReleases(tt.helm, []string{}, 1); !reflect.DeepEqual(tt.helm.releases, tt.wantReleases) {
+				t.Errorf("HelmState.SyncReleases() for [%s] = %v, want %v", tt.name, tt.helm.releases, tt.wantReleases)
+			}
+		})
+	}
+}
+
 func TestHelmState_UpdateDeps(t *testing.T) {
 	state := &HelmState{
 		BaseChartPath: "/src",