diff --git a/sbt-app/src/sbt-test/tests/fork-main-resources/build.sbt b/sbt-app/src/sbt-test/tests/fork-main-resources/build.sbt
new file mode 100644
index 000000000..08d15322b
--- /dev/null
+++ b/sbt-app/src/sbt-test/tests/fork-main-resources/build.sbt
@@ -0,0 +1,6 @@
+val scalatest = "org.scalatest" %% "scalatest" % "3.2.19"
+
+scalaVersion := "3.7.3"
+Test / fork := true
+libraryDependencies += scalatest % Test
+
diff --git a/sbt-app/src/sbt-test/tests/fork-main-resources/src/main/resources/foo b/sbt-app/src/sbt-test/tests/fork-main-resources/src/main/resources/foo
new file mode 100644
index 000000000..c6fe2dcd9
--- /dev/null
+++ b/sbt-app/src/sbt-test/tests/fork-main-resources/src/main/resources/foo
@@ -0,0 +1,2 @@
+test resource content
+
diff --git a/sbt-app/src/sbt-test/tests/fork-main-resources/src/test/scala/ResourceTest.scala b/sbt-app/src/sbt-test/tests/fork-main-resources/src/test/scala/ResourceTest.scala
new file mode 100644
index 000000000..78bce7d8c
--- /dev/null
+++ b/sbt-app/src/sbt-test/tests/fork-main-resources/src/test/scala/ResourceTest.scala
@@ -0,0 +1,10 @@
+import org.scalatest.funsuite.AnyFunSuite
+
+class ResourceTest extends AnyFunSuite {
+  test("access main resource from forked test") {
+    val loader = Thread.currentThread().getContextClassLoader()
+    val resource = loader.getResource("foo")
+    assert(resource != null, "Resource 'foo' from src/main/resources should be accessible in forked test execution")
+  }
+}
+
diff --git a/sbt-app/src/sbt-test/tests/fork-main-resources/test b/sbt-app/src/sbt-test/tests/fork-main-resources/test
new file mode 100644
index 000000000..c8987ae90
--- /dev/null
+++ b/sbt-app/src/sbt-test/tests/fork-main-resources/test
@@ -0,0 +1,2 @@
+> test
+
diff --git a/worker/src/main/java/sbt/internal/worker1/ForkTestMain.java b/worker/src/main/java/sbt/internal/worker1/ForkTestMain.java
index 1a63d1312..a362d3a66 100644
--- a/worker/src/main/java/sbt/internal/worker1/ForkTestMain.java
+++ b/worker/src/main/java/sbt/internal/worker1/ForkTestMain.java
@@ -325,6 +325,7 @@ public class ForkTestMain {
     }
 
     private void runTests(TestInfo info, ClassLoader classLoader) throws Exception {
+      Thread.currentThread().setContextClassLoader(classLoader);
       final ExecutorService executor = executorService(info.parallel);
       final TaskDef[] tests = info.taskDefs.toArray(new TaskDef[] {});
       final int nFrameworks = info.testRunners.size();