diff --git a/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/DefaultContentRootsTests.scala b/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/DefaultContentRootsTests.scala
index c53f42ab2b96..977013dbac1c 100644
--- a/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/DefaultContentRootsTests.scala
+++ b/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/DefaultContentRootsTests.scala
@@ -3,8 +3,15 @@ package io.joern.kotlin2cpg.querying
 import io.joern.kotlin2cpg.testfixtures.KotlinCode2CpgFixture
 import io.shiftleft.codepropertygraph.generated.{DispatchTypes, Operators}
 import io.shiftleft.semanticcpg.language._
+import io.joern.kotlin2cpg.Config
+import io.joern.x2cpg.X2CpgConfig
 
-class DefaultContentRootsTests extends KotlinCode2CpgFixture(withOssDataflow = false, withDefaultJars = true) {
+class DefaultContentRootsTests extends KotlinCode2CpgFixture(withOssDataflow = false) {
+
+  override def getOverrideConfig(): Option[X2CpgConfig[?]] = {
+    val config = Config().withClasspath(getTestResourcesPaths())
+    Some(config)
+  }
 
   "CPG for code with a simple function declaration with parameters of stdlib types, but not fully specified" should {
     val cpg = code("""
diff --git a/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/LambdaTests.scala b/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/LambdaTests.scala
index 978333babf46..bd9644f7c9ff 100644
--- a/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/LambdaTests.scala
+++ b/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/LambdaTests.scala
@@ -7,8 +7,16 @@ import io.shiftleft.codepropertygraph.generated.edges.{Capture, Ref}
 import io.shiftleft.codepropertygraph.generated.nodes.{Binding, Block, ClosureBinding, MethodRef, Return}
 import io.shiftleft.semanticcpg.language._
 import overflowdb.traversal.jIteratortoTraversal
+import io.joern.kotlin2cpg.Config
+import io.joern.x2cpg.X2CpgConfig
+
+class LambdaTests extends KotlinCode2CpgFixture(withOssDataflow = false) {
+
+  override def getOverrideConfig(): Option[X2CpgConfig[?]] = {
+    val config = Config().withClasspath(getTestResourcesPaths())
+    Some(config)
+  }
 
-class LambdaTests extends KotlinCode2CpgFixture(withOssDataflow = false, withDefaultJars = true) {
   "CPG for code with a simple lambda which captures a method parameter" should {
     val cpg = code("fun f1(p: String) { 1.let { println(p) } }")
 
diff --git a/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/TypeAliasTests.scala b/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/TypeAliasTests.scala
index d76b92786d78..c9df63f7272c 100644
--- a/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/TypeAliasTests.scala
+++ b/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/querying/TypeAliasTests.scala
@@ -1,10 +1,18 @@
 package io.joern.kotlin2cpg.querying
 
 import io.joern.kotlin2cpg.testfixtures.KotlinCode2CpgFixture
+import io.joern.kotlin2cpg.Config
 import io.joern.x2cpg.Defines
 import io.shiftleft.semanticcpg.language._
+import io.joern.x2cpg.X2CpgConfig
+
+class TypeAliasTests extends KotlinCode2CpgFixture(withOssDataflow = false) {
+
+  override def getOverrideConfig(): Option[X2CpgConfig[?]] = {
+    val config = Config().withClasspath(getTestResourcesPaths())
+    Some(config)
+  }
 
-class TypeAliasTests extends KotlinCode2CpgFixture(withOssDataflow = false, withDefaultJars = true) {
   "CPG for code with simple typealias to Int" should {
     val cpg = code("""
         |package mypkg
diff --git a/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/testfixtures/KotlinCodeToCpgFixture.scala b/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/testfixtures/KotlinCodeToCpgFixture.scala
index 7a422705bb5c..705cbf22b7ca 100644
--- a/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/testfixtures/KotlinCodeToCpgFixture.scala
+++ b/joern-cli/frontends/kotlin2cpg/src/test/scala/io/joern/kotlin2cpg/testfixtures/KotlinCodeToCpgFixture.scala
@@ -14,23 +14,22 @@ import io.shiftleft.utils.ProjectRoot
 import java.io.File
 
 trait KotlinFrontend extends LanguageFrontend {
-  protected val withTestResourcePaths: Boolean
 
   override val fileSuffix: String = ".kt"
 
   override def execute(sourceCodeFile: File): Cpg = {
-    val defaultContentRoot =
-      BFile(ProjectRoot.relativise("joern-cli/frontends/kotlin2cpg/src/test/resources/jars/"))
-    implicit val defaultConfig: Config =
-      Config(
-        classpath = if (withTestResourcePaths) Set(defaultContentRoot.path.toAbsolutePath.toString) else Set(),
-        includeJavaSourceFiles = true
+    implicit val defaultConfig: Config = getConfig()
+      .map(_.asInstanceOf[Config])
+      .getOrElse(
+        Config(
+          includeJavaSourceFiles = true
+        )
       )
     new Kotlin2Cpg().createCpg(sourceCodeFile.getAbsolutePath).get
   }
 }
 
-class KotlinTestCpg(override protected val withTestResourcePaths: Boolean) extends TestCpg with KotlinFrontend {
+class KotlinTestCpg() extends TestCpg with KotlinFrontend {
   private var _withOssDataflow = false
 
   def withOssDataflow(value: Boolean = true): this.type = {
@@ -49,10 +48,17 @@ class KotlinTestCpg(override protected val withTestResourcePaths: Boolean) exten
   }
 }
 
-class KotlinCode2CpgFixture(withOssDataflow: Boolean = false, withDefaultJars: Boolean = false)
-    extends Code2CpgFixture(() => new KotlinTestCpg(withDefaultJars).withOssDataflow(withOssDataflow)) {
+class KotlinCode2CpgFixture(withOssDataflow: Boolean = false)
+    extends Code2CpgFixture(() => new KotlinTestCpg().withOssDataflow(withOssDataflow)) {
 
   implicit val context: EngineContext = EngineContext()
 
   protected def flowToResultPairs(path: Path): List[(String, Option[Integer])] = path.resultPairs()
+
+  protected def getTestResourcesPaths(): Set[String] = {
+    val defaultContentRoot =
+      BFile(ProjectRoot.relativise("joern-cli/frontends/kotlin2cpg/src/test/resources/jars/"))
+
+    Set(defaultContentRoot.path.toAbsolutePath().toString)
+  }
 }
diff --git a/joern-cli/frontends/x2cpg/src/test/scala/io/joern/x2cpg/testfixtures/Code2CpgFixture.scala b/joern-cli/frontends/x2cpg/src/test/scala/io/joern/x2cpg/testfixtures/Code2CpgFixture.scala
index b07d1d0d60f4..8a62cca1f1a7 100644
--- a/joern-cli/frontends/x2cpg/src/test/scala/io/joern/x2cpg/testfixtures/Code2CpgFixture.scala
+++ b/joern-cli/frontends/x2cpg/src/test/scala/io/joern/x2cpg/testfixtures/Code2CpgFixture.scala
@@ -5,6 +5,7 @@ import org.scalatest.matchers.should.Matchers
 import org.scalatest.wordspec.AnyWordSpec
 
 import scala.collection.mutable
+import io.joern.x2cpg.X2CpgConfig
 
 // Fixture class from which all tests which require a code to CPG translation step
 // should either directly or indirectly use. The intended way is to derive from
@@ -18,18 +19,25 @@ class Code2CpgFixture[T <: TestCpg](testCpgFactory: () => T)
     with Matchers
     with BeforeAndAfterAll
     with Inside {
-  private val cpgs = mutable.ArrayBuffer.empty[TestCpg]
+  private val cpgs                           = mutable.ArrayBuffer.empty[TestCpg]
+  private var config: Option[X2CpgConfig[_]] = None
+
+  /** This method can be overridden to specify config that should be used for all tests in a fixture.
+    */
+  def getOverrideConfig(): Option[X2CpgConfig[_]] = {
+    None
+  }
 
   def code(code: String): T = {
     val newCpg = testCpgFactory().moreCode(code)
     cpgs.append(newCpg)
-    newCpg
+    newCpg.withConfig(getOverrideConfig())
   }
 
   def code(code: String, fileName: String): T = {
     val newCpg = testCpgFactory().moreCode(code, fileName)
     cpgs.append(newCpg)
-    newCpg
+    newCpg.withConfig(getOverrideConfig())
   }
 
   override def afterAll(): Unit = {
diff --git a/joern-cli/frontends/x2cpg/src/test/scala/io/joern/x2cpg/testfixtures/TestCpg.scala b/joern-cli/frontends/x2cpg/src/test/scala/io/joern/x2cpg/testfixtures/TestCpg.scala
index 1f7cb205d277..b7596eb92c5b 100644
--- a/joern-cli/frontends/x2cpg/src/test/scala/io/joern/x2cpg/testfixtures/TestCpg.scala
+++ b/joern-cli/frontends/x2cpg/src/test/scala/io/joern/x2cpg/testfixtures/TestCpg.scala
@@ -40,6 +40,11 @@ abstract class TestCpg extends Cpg() with LanguageFrontend {
     this
   }
 
+  def withConfig(config: Option[X2CpgConfig[_]]): this.type = {
+    config.foreach(setConfig)
+    this
+  }
+
   private def checkGraphEmpty(): Unit = {
     if (_graph.isDefined) {
       throw new RuntimeException("Modifying test data is not allowed after accessing graph.")
diff --git a/querydb/src/test/scala/io/joern/suites/AndroidQueryTestSuite.scala b/querydb/src/test/scala/io/joern/suites/AndroidQueryTestSuite.scala
index b45488e38874..54e6d51d5b7c 100644
--- a/querydb/src/test/scala/io/joern/suites/AndroidQueryTestSuite.scala
+++ b/querydb/src/test/scala/io/joern/suites/AndroidQueryTestSuite.scala
@@ -7,9 +7,16 @@ import io.joern.util.QueryUtil
 import io.shiftleft.codepropertygraph.Cpg
 import io.shiftleft.codepropertygraph.generated.nodes.ConfigFile
 import io.shiftleft.semanticcpg.language._
+import io.joern.x2cpg.X2CpgConfig
+import io.joern.kotlin2cpg.Config
 
 class AndroidQueryTestSuite[QB <: QueryBundle](val queryBundle: QB)
-    extends KotlinCode2CpgFixture(withOssDataflow = true, withDefaultJars = true) {
+    extends KotlinCode2CpgFixture(withOssDataflow = true) {
+
+  override def getOverrideConfig(): Option[X2CpgConfig[_]] = {
+    val config = Config().withClasspath(getTestResourcesPaths())
+    Some(config)
+  }
 
   val argumentProvider = new QDBArgumentProvider(3)