diff --git a/eo-runtime/src/test/java/EOorg/EOeolang/EOcageTest.java b/eo-runtime/src/test/java/EOorg/EOeolang/EOcageTest.java
index e44e790f16..4d4603313c 100644
--- a/eo-runtime/src/test/java/EOorg/EOeolang/EOcageTest.java
+++ b/eo-runtime/src/test/java/EOorg/EOeolang/EOcageTest.java
@@ -46,6 +46,8 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.parallel.Execution;
+import org.junit.jupiter.api.parallel.ExecutionMode;
 
 /**
  * Test case for {@link EOcage}.
@@ -277,6 +279,7 @@ private static void writeTo(final Phi cage, final Phi obj) {
      * @since 0.1
      */
     @Nested
+    @Execution(ExecutionMode.SAME_THREAD)
     class RecursionTests {
 
         /**