diff --git a/jinja-sql-client/src/main/scala/raw/client/jinja/sql/JinjaSqlCompilerService.scala b/jinja-sql-client/src/main/scala/raw/client/jinja/sql/JinjaSqlCompilerService.scala
index 1e356b7e7..cb8e394fc 100644
--- a/jinja-sql-client/src/main/scala/raw/client/jinja/sql/JinjaSqlCompilerService.scala
+++ b/jinja-sql-client/src/main/scala/raw/client/jinja/sql/JinjaSqlCompilerService.scala
@@ -21,7 +21,10 @@ class JinjaSqlCompilerService(maybeClassLoader: Option[ClassLoader] = None)(impl
   def eval(source: String, tipe: raw.client.api.RawType, environment: raw.client.api.ProgramEnvironment): raw.client.api.EvalResponse = ???
     
 
-  def execute(source: String, environment: raw.client.api.ProgramEnvironment, maybeDecl: Option[String], outputStream: java.io.OutputStream): raw.client.api.ExecutionResponse = ???
+  def execute(source: String, environment: raw.client.api.ProgramEnvironment, maybeDecl: Option[String], outputStream: java.io.OutputStream): raw.client.api.ExecutionResponse = {
+    logger.debug("execute")
+    ???
+  }
     
 
   def formatCode(source: String, environment: raw.client.api.ProgramEnvironment, maybeIndent: Option[Int], maybeWidth: Option[Int]): raw.client.api.FormatCodeResponse = ???
diff --git a/jinja-sql-client/src/test/scala/PreprocessingTest.scala b/jinja-sql-client/src/test/scala/PreprocessingTest.scala
index 260b39080..7f37cc41c 100644
--- a/jinja-sql-client/src/test/scala/PreprocessingTest.scala
+++ b/jinja-sql-client/src/test/scala/PreprocessingTest.scala
@@ -1,9 +1,40 @@
-import org.scalatest.funsuite.AnyFunSuite
+import raw.client.api.{CompilerService, ExecutionSuccess, ProgramEnvironment, RawValue}
+import raw.client.jinja.sql.JinjaSqlCompilerService
+import raw.utils.{InteractiveUser, RawTestSuite, SettingsTestContext, TrainingWheelsContext, Uid}
 
-class PreprocessingTest extends AnyFunSuite {
+import java.io.ByteArrayOutputStream
 
-  test("1+1 works") {
-    assert(1 + 1 === 2)
+class PreprocessingTest extends RawTestSuite
+  with SettingsTestContext
+  with TrainingWheelsContext
+{
+
+  test("SELECT") { q =>
+    val baos = new ByteArrayOutputStream()
+    val r = compilerService.execute(q.q, asJson(), None, baos)
+    assert(r == ExecutionSuccess)
+  }
+
+  private var compilerService: CompilerService = _
+
+  private val database = ""
+  private val user = InteractiveUser(Uid(database), "fdw user", "email", Seq.empty)
+
+  private def asJson(params: Map[String, RawValue] = Map.empty): ProgramEnvironment = {
+    if (params.isEmpty) ProgramEnvironment(user, None, Set.empty, Map("output-format" -> "json"))
+    else ProgramEnvironment(user, Some(params.toArray), Set.empty, Map("output-format" -> "json"))
+  }
+
+  override def beforeAll(): Unit = {
+    super.beforeAll()
+    compilerService = new JinjaSqlCompilerService(None)
+  }
+
+  override def afterAll(): Unit = {
+    if (compilerService != null) {
+      compilerService.stop()
+      compilerService = null
+    }
   }
 
 }