diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 3008a1d..68b530a 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -8205,6 +8205,12 @@
     {
 	ui_delay(msec - done > 1000L ? 1000L : msec - done, TRUE);
 	ui_breakcheck();
+#ifdef FEAT_NETBEANS_INTG
+	/* Process the netbeans messages that may have been received in the
+	 * call to ui_breakcheck() when the GUI is in use. This may occur when
+	 * running a test case. */
+	netbeans_parse_messages();
+#endif
     }
 }
 
diff --git a/src/netbeans.c b/src/netbeans.c
index 5b9161d..59348f0 100644
--- a/src/netbeans.c
+++ b/src/netbeans.c
@@ -14,6 +14,13 @@
  * which are *between* characters, whereas vim uses line number
  * and column number which are *on* characters.
  * See ":help netbeans-protocol" for explanation.
+ *
+ * The Netbeans messages are received and queued in the gui event loop, or in
+ * the select loop when Vim runs in a terminal. These messages are processed
+ * by netbeans_parse_messages() which is invoked in the idle loop when Vim is
+ * waiting for user input. The function netbeans_parse_messages() is also
+ * called from the ":sleep" command, to allow the execution of test cases that
+ * may not invoke the idle loop.
  */
 
 #include "vim.h"
diff --git a/src/version.c b/src/version.c
index 01ee544..80c2460 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    346,
+/**/
     345,
 /**/
     344,