diff --git a/core/src/main/java/org/jruby/RubyClass.java b/core/src/main/java/org/jruby/RubyClass.java
index e3a77e2db9c..ad305373d58 100644
--- a/core/src/main/java/org/jruby/RubyClass.java
+++ b/core/src/main/java/org/jruby/RubyClass.java
@@ -60,6 +60,7 @@
 import org.jruby.compiler.impl.SkinnyMethodAdapter;
 import org.jruby.exceptions.RaiseException;
 import org.jruby.internal.runtime.methods.DynamicMethod;
+import org.jruby.java.codegen.MultiClassLoader;
 import org.jruby.java.codegen.RealClassGenerator;
 import org.jruby.java.codegen.Reified;
 import org.jruby.java.proxies.ConcreteJavaProxy;
@@ -90,6 +91,7 @@
 import org.jruby.util.ClassDefiningClassLoader;
 import org.jruby.util.CodegenUtils;
 import org.jruby.util.JavaNameMangler;
+import org.jruby.util.Loader;
 import org.jruby.util.OneShotClassLoader;
 import org.jruby.util.StringSupport;
 import org.jruby.util.collections.ConcurrentWeakHashMap;
@@ -1357,7 +1359,11 @@ public synchronized void reify(String classDumpDir, boolean useChildLoader) {
             parentCL = (OneShotClassLoader) parentReified.getClassLoader();
         } else {
             if (useChildLoader) {
-                parentCL = new OneShotClassLoader(runtime.getJRubyClassLoader());
+                MultiClassLoader parentLoader = new MultiClassLoader(runtime.getJRubyClassLoader());
+                for(Loader cLoader : runtime.getInstanceConfig().getExtraLoaders()) {
+                    parentLoader.addClassLoader(cLoader.getClassLoader());
+                }
+                parentCL = new OneShotClassLoader(parentLoader);
             } else {
                 parentCL = runtime.getJRubyClassLoader();
             }
diff --git a/rakelib/test.rake b/rakelib/test.rake
index 7c75cb8c243..fd6c7b2f4a5 100644
--- a/rakelib/test.rake
+++ b/rakelib/test.rake
@@ -25,11 +25,21 @@ namespace :test do
   desc "Compile test code"
   task :compile do
     mkdir_p "test/target/test-classes"
+    mkdir_p "test/target/test-classes-isolated/java_integration/fixtures/isolated"
+    mkdir_p "test/target/test-interfaces-isolated/java_integration/fixtures/isolated"
+
     classpath = %w[lib/jruby.jar test/target/junit.jar test/target/annotation-api.jar].join(File::PATH_SEPARATOR)
     # try detecting javac - so we use the same Java versions as we're running (JAVA_HOME) with :
     java_home = [ ENV_JAVA['java.home'], File.join(ENV_JAVA['java.home'], '..') ] # in case of jdk/jre
     javac = java_home.map { |home| File.expand_path('bin/javac', home) }.find { |javac| File.exist?(javac) } || 'javac'
     sh "#{javac} -cp #{classpath} -d test/target/test-classes #{Dir['spec/java_integration/fixtures/**/*.java'].to_a.join(' ')}"
+    # move the objects that need to be in separate class loaders
+    mv "test/target/test-classes/java_integration/fixtures/isolated/classes",
+       "test/target/test-classes-isolated/java_integration/fixtures/isolated",
+       force: true
+    mv "test/target/test-classes/java_integration/fixtures/isolated/interfaces",
+       "test/target/test-interfaces-isolated/java_integration/fixtures/isolated",
+       force: true
   end
 
   short_tests = ['jruby', 'mri']
diff --git a/spec/java_integration/fixtures/isolated/classes/GH7327Base.java b/spec/java_integration/fixtures/isolated/classes/GH7327Base.java
new file mode 100644
index 00000000000..cb158cd3fb8
--- /dev/null
+++ b/spec/java_integration/fixtures/isolated/classes/GH7327Base.java
@@ -0,0 +1,4 @@
+package java_integration.fixtures.isolated.classes;
+
+public class GH7327Base {
+}
diff --git a/spec/java_integration/fixtures/isolated/interfaces/GH7327Interface.java b/spec/java_integration/fixtures/isolated/interfaces/GH7327Interface.java
new file mode 100644
index 00000000000..3055f3b3862
--- /dev/null
+++ b/spec/java_integration/fixtures/isolated/interfaces/GH7327Interface.java
@@ -0,0 +1,4 @@
+package java_integration.fixtures.isolated.interfaces;
+
+public interface GH7327Interface {
+}
diff --git a/spec/java_integration/reify/become_java_spec.rb b/spec/java_integration/reify/become_java_spec.rb
index 93c6cd1b9dc..7ea296c4374 100644
--- a/spec/java_integration/reify/become_java_spec.rb
+++ b/spec/java_integration/reify/become_java_spec.rb
@@ -341,6 +341,37 @@ class JRUBY5564; end
     expect(klass.load_class(a_class.get_name)).to eq(a_class)
   end
 
+  it "supports reifying concrete classes extending classes from an unrelated class loader" do
+    isolated_class_path = File.expand_path('../../../../test/target/test-classes-isolated', __FILE__)
+    classloader = java.net.URLClassLoader.new([java.net.URL.new("file://#{isolated_class_path}/")].to_java(java.net.URL))
+    JRuby.runtime.instance_config.add_loader(classloader)
+
+    # we can reference it from JRuby, because it was added to the JRuby loader above
+    class GH7327 < Java::Java_integrationFixturesIsolatedClasses::GH7327Base; end
+    # it should have created a unique Java class
+    expect(GH7327.become_java!).not_to eq(Java::Java_integrationFixturesIsolatedClasses::GH7327Base.java_class)
+  ensure
+    JRuby.runtime.instance_config.extra_loaders.clear
+  end
+
+  it "supports reifying concrete classes extending classes and implementing interfaces from multiple unrelated class loaders" do
+    isolated_class_path = File.expand_path('../../../../test/target/test-classes-isolated', __FILE__)
+    classloader1 = java.net.URLClassLoader.new([java.net.URL.new("file://#{isolated_class_path}/")].to_java(java.net.URL))
+    JRuby.runtime.instance_config.add_loader(classloader1)
+    isolated_interface_path = File.expand_path('../../../../test/target/test-interfaces-isolated', __FILE__)
+    classloader2 = java.net.URLClassLoader.new([java.net.URL.new("file://#{isolated_interface_path}/")].to_java(java.net.URL))
+    JRuby.runtime.instance_config.add_loader(classloader2)
+
+    # we can reference them from JRuby, because they were added to the JRuby loader above
+    class GH7327WithInterface < Java::Java_integrationFixturesIsolatedClasses::GH7327Base
+      include Java::Java_integrationFixturesIsolatedInterfaces::GH7327Interface
+    end
+    # it should have created a unique Java class
+    expect(GH7327WithInterface.become_java!).not_to eq(Java::Java_integrationFixturesIsolatedClasses::GH7327Base.java_class)
+  ensure
+    JRuby.runtime.instance_config.extra_loaders.clear
+  end
+
   class ReifiedSample
     def hello; 'Sayonara from Ruby' end
     java_signature "java.lang.String ahoy()"