diff --git a/errors_test.go b/errors_test.go
index bb74de0f..52810782 100644
--- a/errors_test.go
+++ b/errors_test.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"database/sql/driver"
+	"errors"
 	"strings"
 	"testing"
 
@@ -304,7 +305,7 @@ func TestErrAPISetValue(t *testing.T) {
 func TestDuckDBErrors(t *testing.T) {
 	db := openDB(t)
 	defer db.Close()
-	createTable(db, t, `CREATE TABLE duckdberror_test(bar VARCHAR UNIQUE, baz INT32)`)
+	createTable(db, t, `CREATE TABLE duckdberror_test(bar VARCHAR UNIQUE, baz INT32, u_1 UNION("string" VARCHAR))`)
 	_, err := db.Exec("INSERT INTO duckdberror_test(bar, baz) VALUES('bar', 0)")
 	require.NoError(t, err)
 
@@ -316,10 +317,6 @@ func TestDuckDBErrors(t *testing.T) {
 			tpl:    "SELECT * FROM not_exist WHERE baz=0",
 			errTyp: ErrorTypeCatalog,
 		},
-		{
-			tpl:    "COPY duckdberror_test FROM 'test.json'",
-			errTyp: ErrorTypeCatalog,
-		},
 		{
 			tpl:    "SELECT * FROM duckdberror_test WHERE col=?",
 			errTyp: ErrorTypeBinder,
@@ -344,14 +341,30 @@ func TestDuckDBErrors(t *testing.T) {
 			tpl:    "LOAD not_exist",
 			errTyp: ErrorTypeIO,
 		},
+		{
+			tpl:    "SELECT array_length(array_value(array_value(1, 2, 2), array_value(3, 4, 3)), 3)",
+			errTyp: ErrorTypeOutOfRange,
+		},
+		{
+			tpl:    "SELECT '010110'::BIT & '11000'::BIT",
+			errTyp: ErrorTypeInvalidInput,
+		},
+		{
+			tpl:    "SET external_threads=-1",
+			errTyp: ErrorTypeSyntax,
+		},
+		{
+			tpl:    "CREATE UNIQUE INDEX idx ON duckdberror_test(u_1)",
+			errTyp: ErrorTypeInvalidType,
+		},
 	}
 	for _, tc := range testCases {
 		_, err := db.Exec(tc.tpl)
 		de, ok := err.(*Error)
 		if !ok {
-			require.Fail(t, "error type is not DuckDBError", "tql: %s\ngot: %#v", tc.tpl, err)
+			require.Fail(t, "error type is not (*duckdb.Error)", "tql: %s\ngot: %#v", tc.tpl, err)
 		}
-		require.Equal(t, de.Type, tc.errTyp, "tql: %s\nactual error msg: %s", tc.tpl, de.Msg)
+		require.Equal(t, de.Type, tc.errTyp, "tpl: %s\nactual error msg: %s", tc.tpl, de.Msg)
 	}
 }
 
@@ -386,3 +399,41 @@ func TestGetDuckDBError(t *testing.T) {
 		require.Equal(t, tc, err)
 	}
 }
+
+type wrappedDuckDBError struct {
+	e *Error
+}
+
+func (w *wrappedDuckDBError) Error() string {
+	return w.e.Error()
+}
+func (w *wrappedDuckDBError) Unwrap() error {
+	return w.e
+}
+
+func TestGetDuckDBErrorIs(t *testing.T) {
+	const errMsg = "Out of Range Error: Overflow"
+	outOfRangeErr1 := &Error{
+		Type: ErrorTypeOutOfRange,
+		Msg:  errMsg,
+	}
+	outOfRangeErr1Copy := &Error{
+		Type: ErrorTypeOutOfRange,
+		Msg:  errMsg,
+	}
+	outOfRangeErr2 := &Error{
+		Type: ErrorTypeOutOfRange,
+		Msg:  "Out of Range Error: array_length dimension '3' out of range (min: '1', max: '2')",
+	}
+	invalidInputErr := &Error{
+		Type: ErrorTypeInvalidInput,
+		Msg:  "Invalid Input Error: Map keys can not be NULL",
+	}
+
+	require.ErrorIs(t, outOfRangeErr1, outOfRangeErr1)
+	require.ErrorIs(t, outOfRangeErr1Copy, outOfRangeErr1)
+	require.ErrorIs(t, &wrappedDuckDBError{outOfRangeErr1Copy}, outOfRangeErr1)
+	require.Equal(t, false, errors.Is(outOfRangeErr2, outOfRangeErr1))
+	require.Equal(t, false, errors.Is(invalidInputErr, outOfRangeErr1))
+	require.Equal(t, false, errors.Is(errors.New(errMsg), outOfRangeErr1))
+}
diff --git a/statement_test.go b/statement_test.go
index de3db830..5ebca8a1 100644
--- a/statement_test.go
+++ b/statement_test.go
@@ -84,7 +84,7 @@ func TestPrepareWithError(t *testing.T) {
 		stmt, err := db.Prepare(tc.tpl)
 		if err != nil {
 			if _, ok := err.(*Error); !ok {
-				require.Fail(t, "error type is not DuckDBError")
+				require.Fail(t, "error type is not (*duckdb.Error)")
 			}
 			require.ErrorContains(t, err, tc.err)
 			continue