diff --git a/test/java/foundation/pEp/jniadapter/test/jni150/Makefile b/test/java/foundation/pEp/jniadapter/test/jni150/Makefile
new file mode 100644
index 0000000..dc37d4c
--- /dev/null
+++ b/test/java/foundation/pEp/jniadapter/test/jni150/Makefile
@@ -0,0 +1,34 @@
+include ../../../../../../../Makefile.conf
+include ../Makefile.conf
+
+TEST_UNIT_NAME=jni150
+
+JAVA_CLASSES+= \
+ 	TestAlice.class
+
+.PHONY: pitytest compile alice test clean
+
+all: alice compile
+
+pitytest:
+	$(MAKE) -C $(PITYTEST_DIR)
+
+alice: compile clean-pep-home-alice
+	cd $(JAVA_CWD);pwd;HOME=$(JAVA_PEP_HOME_DIR_ALICE) $(JAVA) $(JAVA_PKG_BASENAME).$(TEST_UNIT_NAME).TestAlice
+
+compile: $(JAVA_CLASSES) pitytest
+
+%.class: %.java
+	cd $(JAVA_CWD);javac -cp $(CLASSPATH) $(JAVA_PKG_BASEPATH)/$(TEST_UNIT_NAME)/$<
+
+clean:
+	rm -f $(JAVA_CLASSES)
+	rm -f *.class
+	rm -f *.log
+	rm -Rf .gnupg
+	rm -Rf .lldb
+
+clean-pep-home: clean-pep-home-alice
+
+clean-pep-home-alice:
+	rm -rf $(PEP_HOME_DIR_ALICE)/.pEp
diff --git a/test/java/foundation/pEp/jniadapter/test/jni150/TestAlice.java b/test/java/foundation/pEp/jniadapter/test/jni150/TestAlice.java
new file mode 100644
index 0000000..7611a70
--- /dev/null
+++ b/test/java/foundation/pEp/jniadapter/test/jni150/TestAlice.java
@@ -0,0 +1,54 @@
+package foundation.pEp.jniadapter.test.jni150;
+
+import foundation.pEp.jniadapter.Identity;
+import foundation.pEp.jniadapter.test.utils.AdapterTestUtils;
+import foundation.pEp.jniadapter.test.utils.CTXBase;
+import foundation.pEp.pitytest.TestSuite;
+import foundation.pEp.pitytest.TestUnit;
+import foundation.pEp.pitytest.utils.TestUtils;
+
+import static foundation.pEp.pitytest.TestLogger.log;
+
+
+/*
+JNI-150 - Test: Ident.user_id For Own Identities
+
+Expected Behaviour
+after creating keypairs on new and first identity in a pEp-DB (alice) using myself()
+alice.user_id has the user_id that has been provided to myself()
+
+For every following ident created using myself():
+ident.user_id has to be equal to alice.user_id
+*/
+
+
+class TestAlice {
+    public static void main(String[] args) throws Exception {
+        TestSuite.getDefault().setVerbose(true);
+        TestSuite.getDefault().setTestColor(TestUtils.TermColor.GREEN);
+
+        CTXBase ctxBase = new CTXBase();
+
+        new TestUnit<CTXBase>("user_id after first myself() ever", ctxBase, ctx -> {
+            Identity result = ctx.engine.myself(ctx.alice);
+            log(AdapterTestUtils.identityToString(result, true));
+            assert result.user_id.equals(ctx.alice.user_id): result.address + ": user_id is expected to be "+ctx.alice.user_id+", but is: " + result.user_id;
+        });
+
+        new TestUnit<CTXBase>("user_id constant for all own_identities", ctxBase, ctx -> {
+            Identity result = ctx.engine.myself(ctx.bob);
+            log(AdapterTestUtils.identityToString(result, true));
+            assert result.user_id.equals(ctx.alice.user_id): result.address + ": user_id is expected to be "+ctx.alice.user_id+", but is: " + result.user_id;
+        });
+
+        new TestUnit<CTXBase>("user_id constant for all own_identities", ctxBase, ctx -> {
+            Identity result = ctx.engine.myself(ctx.carol);
+            log(AdapterTestUtils.identityToString(result, true));
+            assert result.user_id.equals(ctx.alice.user_id): result.address + ": user_id is expected to be "+ctx.alice.user_id+", but is: " + result.user_id;
+        });
+
+        TestSuite.getDefault().run();
+    }
+}
+
+