It seems a diff pb. You have

```java
@Test
    public void testST_TransformOnMULTILINESTRING() throws Exception {
        checkProjectedGeom("MULTILINESTRING ((0 0, 1 0))", 4326, 4326,
                "MULTILINESTRING ((0 0, 1 0))");
        final ResultSet rs = st.executeQuery("SELECT ST_TRANSFORM(" +
                "ST_GeomFromText('MULTILINESTRING ((2.11 50.34, 2.15 51))', 4326 ), 2154);");
        checkWithTolerance(rs,
                "MULTILINESTRING ((636559.3165826919 7027274.112512174, 640202.1706468144 7100786.438815401))", 2154,10E-15 );
    }
```