diff --git a/test/embed_ruby.cpp b/test/embed_ruby.cpp
index 5b1d4d10..f356be00 100644
--- a/test/embed_ruby.cpp
+++ b/test/embed_ruby.cpp
@@ -7,14 +7,9 @@ void embed_ruby()
 
   if (!initialized__)
   {
-    int argc = 0;
-    char* argv = nullptr;
-    char** pArgv = &argv;
-
-    ruby_sysinit(&argc, &pArgv);
+    RUBY_INIT_STACK;
     ruby_init();
     ruby_init_loadpath();
-    rb_gc_disable();
 
 #if RUBY_API_VERSION_MAJOR == 3 && RUBY_API_VERSION_MINOR >= 1
     // Force the prelude / builtins
diff --git a/test/test_Keep_Alive.cpp b/test/test_Keep_Alive.cpp
index b6675574..f12f5ea3 100644
--- a/test/test_Keep_Alive.cpp
+++ b/test/test_Keep_Alive.cpp
@@ -160,7 +160,7 @@ TESTCASE(test_return)
   Module m = define_module("TestingModule");
 
   Object column = getColumn(m, 3);
-  //rb_gc_start();
+  rb_gc_start();
   String name = column.call("name");
   ASSERT_EQUAL("column_3", name.c_str());
 }
diff --git a/test/test_Tracking.cpp b/test/test_Tracking.cpp
index 4215ff36..e506a04c 100644
--- a/test/test_Tracking.cpp
+++ b/test/test_Tracking.cpp
@@ -225,11 +225,11 @@ TESTCASE(RubyObjectGced)
   {
     // Track the C++ object returned by keepPointer
     Data_Object<MyClass> my_class1 = factory.call("keep_pointer");
-    //rb_gc_start();
+    rb_gc_start();
   }
 
   // Make my_class1 invalid
-  //rb_gc_start();
+  rb_gc_start();
 
   // Get the object again - this should *not* return the previous value
   Data_Object<MyClass> my_class2 = factory.call("keep_pointer");