diff --git a/polygon_test.go b/polygon_test.go
index f8b02ca2..7bda2628 100644
--- a/polygon_test.go
+++ b/polygon_test.go
@@ -20,3 +20,45 @@ func TestPolygonTranscode(t *testing.T) {
 		&pgtype.Polygon{Status: pgtype.Null},
 	})
 }
+
+func TestPolygon_Set(t *testing.T) {
+	tests := []struct {
+		name    string
+		arg     interface{}
+		status  pgtype.Status
+		wantErr bool
+	}{
+		{
+			name:    "string",
+			arg:     "((3.14,1.678901234),(7.1,5.234),(5.0,3.234))",
+			status:  pgtype.Present,
+			wantErr: false,
+		}, {
+			name:    "[]float64",
+			arg:     []float64{1, 2, 3.45, 6.78, 1.23, 4.567, 8.9, 1.0},
+			status:  pgtype.Present,
+			wantErr: false,
+		}, {
+			name:    "[]Vec2",
+			arg:     []pgtype.Vec2{{1, 2}, {2.3, 4.5}, {6.78, 9.123}},
+			status:  pgtype.Present,
+			wantErr: false,
+		}, {
+			name:    "null",
+			arg:     nil,
+			status:  pgtype.Null,
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			dst := &pgtype.Polygon{}
+			if err := dst.Set(tt.arg); (err != nil) != tt.wantErr {
+				t.Errorf("Set() error = %v, wantErr %v", err, tt.wantErr)
+			}
+			if dst.Status != tt.status {
+				t.Errorf("Expected status: %v; got: %v", tt.status, dst.Status)
+			}
+		})
+	}
+}