diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index dd65f916..e22730a1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java_version: ['17', '21']
+        java_version: ['17', '21', '23']
         os: ['ubuntu-22.04']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"
diff --git a/jr-retrofit2/src/main/java/module-info.java b/jr-retrofit2/src/main/java/module-info.java
index 353539a3..01bdbc3a 100644
--- a/jr-retrofit2/src/main/java/module-info.java
+++ b/jr-retrofit2/src/main/java/module-info.java
@@ -1,9 +1,9 @@
+// Jackson-jr Retrofit 2 module Main artifact Module descriptor
 module tools.jackson.jr.retrofit2
 {
-    requires transitive tools.jackson.jr.ob;
-    // 11-Mar-2019, tatu: These are probably not right...
-    requires transitive okhttp3;
-    requires transitive retrofit2;
+    requires tools.jackson.jr.ob;
+    requires okhttp3;
+    requires retrofit2;
 
     exports tools.jackson.jr.retrofit2;
 }
diff --git a/jr-stree/pom.xml b/jr-stree/pom.xml
index 2134b453..452eec5f 100644
--- a/jr-stree/pom.xml
+++ b/jr-stree/pom.xml
@@ -50,10 +50,6 @@ has no other dependencies.
         <groupId>com.google.code.maven-replacer-plugin</groupId>
         <artifactId>replacer</artifactId>
       </plugin>
-      <plugin>
-        <groupId>org.moditect</groupId>
-        <artifactId>moditect-maven-plugin</artifactId>
-      </plugin>
       <plugin>
         <groupId>de.jjohannes</groupId>
         <artifactId>gradle-module-metadata-maven-plugin</artifactId>
diff --git a/jr-stree/src/moditect/module-info.java b/jr-stree/src/main/java/module-info.java
similarity index 61%
rename from jr-stree/src/moditect/module-info.java
rename to jr-stree/src/main/java/module-info.java
index 4efdf1d5..53f46cac 100644
--- a/jr-stree/src/moditect/module-info.java
+++ b/jr-stree/src/main/java/module-info.java
@@ -1,4 +1,6 @@
-module tools.jackson.jr.stree {
+// Jackson-jr Simple Tree module Main artifact Module descriptor
+module tools.jackson.jr.stree
+{
     requires transitive tools.jackson.core;
     requires tools.jackson.jr.ob;
 
diff --git a/jr-stree/src/test/java/module-info.java b/jr-stree/src/test/java/module-info.java
new file mode 100644
index 00000000..e9b21e9a
--- /dev/null
+++ b/jr-stree/src/test/java/module-info.java
@@ -0,0 +1,15 @@
+// Jackson-jr Simple Tree module Test artifact descriptor
+module tools.jackson.jr.stree
+{
+    // Since we are not split from Main artifact, will not
+    // need to depend on Main artifact -- but need its dependencies
+    requires tools.jackson.core;
+    requires tools.jackson.jr.ob;
+
+    // Additional test lib/framework dependencies
+    requires org.junit.jupiter.api; // JUnit 5
+
+    // Further, need to open up test packages for JUnit et al
+    opens tools.jackson.jr.stree;
+    opens tools.jackson.jr.stree.util;
+}