diff --git a/tests/mysql/select_test.go b/tests/mysql/select_test.go
index 2360a16..637ed05 100644
--- a/tests/mysql/select_test.go
+++ b/tests/mysql/select_test.go
@@ -469,3 +469,30 @@ FOR`
 		assert.NilError(t, err)
 	}
 }
+
+func TestExpressionWrappers(t *testing.T) {
+	query := SELECT(
+		BoolExp(Raw("true")),
+		IntExp(Raw("11")),
+		FloatExp(Raw("11.22")),
+		StringExp(Raw("'stringer'")),
+		TimeExp(Raw("'raw'")),
+		TimestampExp(Raw("'raw'")),
+		DateTimeExp(Raw("'raw'")),
+		DateExp(Raw("'date'")),
+	)
+
+	testutils.AssertStatementSql(t, query, `
+SELECT true,
+     11,
+     11.22,
+     'stringer',
+     'raw',
+     'raw',
+     'raw',
+     'date';
+`)
+
+	err := query.Query(db, &struct{}{})
+	assert.NilError(t, err)
+}
diff --git a/tests/postgres/select_test.go b/tests/postgres/select_test.go
index 066f64c..8d63d8c 100644
--- a/tests/postgres/select_test.go
+++ b/tests/postgres/select_test.go
@@ -2,7 +2,6 @@ package postgres
 
 import (
 	"fmt"
-	"github.com/go-jet/jet/internal/jet"
 	"github.com/go-jet/jet/internal/testutils"
 	. "github.com/go-jet/jet/postgres"
 	"github.com/go-jet/jet/tests/.gentestdata/jetdb/dvds/enum"
@@ -1273,36 +1272,68 @@ OFFSET 20;
 }
 
 func TestAllSetOperators(t *testing.T) {
+	var select1 = Payment.SELECT(Payment.AllColumns).WHERE(Payment.PaymentID.GT_EQ(Int(17600)).AND(Payment.PaymentID.LT(Int(17610))))
+	var select2 = Payment.SELECT(Payment.AllColumns).WHERE(Payment.PaymentID.GT_EQ(Int(17620)).AND(Payment.PaymentID.LT(Int(17630))))
 
-	select1 := Payment.SELECT(Payment.AllColumns).WHERE(Payment.PaymentID.GT_EQ(Int(17600)).AND(Payment.PaymentID.LT(Int(17610))))
-	select2 := Payment.SELECT(Payment.AllColumns).WHERE(Payment.PaymentID.GT_EQ(Int(17620)).AND(Payment.PaymentID.LT(Int(17630))))
-
-	type setOperator func(lhs, rhs jet.StatementWithProjections, selects ...jet.StatementWithProjections) SetStatement
-	operators := []setOperator{
-		UNION,
-		UNION_ALL,
-		INTERSECT,
-		INTERSECT_ALL,
-	}
-
-	expectedDestLen := []int{
-		20,
-		20,
-		0,
-		0,
-		10,
-		10,
-	}
-
-	for i, operator := range operators {
-		query := operator(select1, select2)
+	t.Run("UNION", func(t *testing.T) {
+		query := select1.UNION(select2)
 
 		dest := []model.Payment{}
 		err := query.Query(db, &dest)
 
 		assert.NilError(t, err)
-		assert.Equal(t, len(dest), expectedDestLen[i])
-	}
+		assert.Equal(t, len(dest), 20)
+	})
+
+	t.Run("UNION_ALL", func(t *testing.T) {
+		query := select1.UNION_ALL(select2)
+
+		dest := []model.Payment{}
+		err := query.Query(db, &dest)
+
+		assert.NilError(t, err)
+		assert.Equal(t, len(dest), 20)
+	})
+
+	t.Run("INTERSECT", func(t *testing.T) {
+		query := select1.INTERSECT(select2)
+
+		dest := []model.Payment{}
+		err := query.Query(db, &dest)
+
+		assert.NilError(t, err)
+		assert.Equal(t, len(dest), 0)
+	})
+
+	t.Run("INTERSECT_ALL", func(t *testing.T) {
+		query := select1.INTERSECT_ALL(select2)
+
+		dest := []model.Payment{}
+		err := query.Query(db, &dest)
+
+		assert.NilError(t, err)
+		assert.Equal(t, len(dest), 0)
+	})
+
+	t.Run("EXCEPT", func(t *testing.T) {
+		query := select1.EXCEPT(select2)
+
+		dest := []model.Payment{}
+		err := query.Query(db, &dest)
+
+		assert.NilError(t, err)
+		assert.Equal(t, len(dest), 10)
+	})
+
+	t.Run("EXCEPT_ALL", func(t *testing.T) {
+		query := select1.EXCEPT_ALL(select2)
+
+		dest := []model.Payment{}
+		err := query.Query(db, &dest)
+
+		assert.NilError(t, err)
+		assert.Equal(t, len(dest), 10)
+	})
 }
 
 func TestSelectWithCase(t *testing.T) {
@@ -1559,3 +1590,32 @@ func TestQuickStartWithSubQueries(t *testing.T) {
 	//jsonSave("./testdata/quick-start-dest2.json", dest2)
 	testutils.AssertJSONFile(t, dest2, "./postgres/testdata/quick-start-dest2.json")
 }
+
+func TestExpressionWrappers(t *testing.T) {
+	query := SELECT(
+		BoolExp(Raw("true")),
+		IntExp(Raw("11")),
+		FloatExp(Raw("11.22")),
+		StringExp(Raw("'stringer'")),
+		TimeExp(Raw("'raw'")),
+		TimezExp(Raw("'raw'")),
+		TimestampExp(Raw("'raw'")),
+		TimestampzExp(Raw("'raw'")),
+		DateExp(Raw("'date'")),
+	)
+
+	testutils.AssertStatementSql(t, query, `
+SELECT true,
+     11,
+     11.22,
+     'stringer',
+     'raw',
+     'raw',
+     'raw',
+     'raw',
+     'date';
+`)
+
+	err := query.Query(db, &struct{}{})
+	assert.NilError(t, err)
+}
diff --git a/tests/postgres/util_test.go b/tests/postgres/util_test.go
index 88359e0..3f00e7b 100644
--- a/tests/postgres/util_test.go
+++ b/tests/postgres/util_test.go
@@ -23,6 +23,7 @@ func assertExecErr(t *testing.T, stmt jet.Statement, errorStr string) {
 
 	assert.Error(t, err, errorStr)
 }
+
 func BoolPtr(b bool) *bool {
 	return &b
 }