diff --git a/src/apitest/vim_test.c b/src/apitest/vim_test.c
new file mode 100644
index 000000000..cb1ccda9b
--- /dev/null
+++ b/src/apitest/vim_test.c
@@ -0,0 +1,15 @@
+#include <assert.h>
+#include <stdio.h>
+#include "libvim.h"
+
+int main(int argc, char **argv) {
+  vimInit(argc, argv);
+
+  win_setwidth(5);
+  win_setheight(100);
+
+  printf("BEFORE\n");
+  vimExecute("so D:/libvim1/src/testdir/test_arglist.vim");
+  vimExecute("so D:/libvim1/src/testdir/runtest.vim");
+  printf("AFTER\n");
+}
diff --git a/src/eval.c b/src/eval.c
index af7a4af8a..102f2fbaa 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -9453,6 +9453,7 @@ prepare_assert_error(garray_T *gap)
     void
 assert_error(garray_T *gap)
 {
+    printf("ASSERT ERROR!\n");
     struct vimvar   *vp = &vimvars[VV_ERRORS];
 
     if (vp->vv_type != VAR_LIST || vimvars[VV_ERRORS].vv_list == NULL)
diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 6e38a7713..e9f11d0f4 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -3208,6 +3208,7 @@ ex_source(exarg_T *eap)
     static void
 cmd_source(char_u *fname, exarg_T *eap)
 {
+    printf("Trying to source: %s\n", fname);
     if (*fname == NUL)
 	emsg(_(e_argreq));
 
@@ -3333,6 +3334,7 @@ do_source(
     int		check_other,	    /* check for .vimrc and _vimrc */
     int		is_vimrc)	    /* DOSO_ value */
 {
+    printf("DO SOURCE: %s\n", fname);
     struct source_cookie    cookie;
     char_u		    *save_sourcing_name;
     linenr_T		    save_sourcing_lnum;
@@ -3425,18 +3427,22 @@ do_source(
 
     if (cookie.fp == NULL)
     {
-	if (p_verbose > 0)
-	{
+	/* if (p_verbose > 0) */
+	/* { */
 	    verbose_enter();
-	    if (sourcing_name == NULL)
+	    if (sourcing_name == NULL) {
+    printf("could not source %s\n");
 		smsg(_("could not source \"%s\""), fname);
-	    else
+	    }
+	    else {
+    printf("could not source %s\n");
 		smsg(_("line %ld: could not source \"%s\""),
-							sourcing_lnum, fname);
+							sourcing_lnum, fname); }
 	    verbose_leave();
-	}
+	/* } */
 	goto theend;
     }
+    printf("file exists\n");
 
     /*
      * The file exists.
diff --git a/src/message.c b/src/message.c
index 1ef44f7d6..090e72f3d 100644
--- a/src/message.c
+++ b/src/message.c
@@ -68,7 +68,7 @@ static int  verbose_did_open = FALSE;
  *		    Set: When any message is written to the screen.
  * msg_nowait	    No extra delay for the last drawn message.
  *		    Used in normal_cmd() before the mode message is drawn.
- * emsg_on_display  There was an error message recently.  Indicates that there
+ * emsg_on_displa  There was an error message recently.  Indicates that there
  *		    should be a delay before redrawing.
  * msg_scroll	    The next message should not overwrite the current one.
  * msg_scrolled	    How many lines the screen has been scrolled (because of
@@ -359,6 +359,7 @@ int vim_snprintf(char *str, size_t str_m, const char *fmt, ...);
     int
 smsg(const char *s, ...)
 {
+    printf("SMSG: %s\n", s);
     va_list arglist;
 
     va_start(arglist, s);
@@ -712,6 +713,7 @@ emsg_core(char_u *s)
     int
 emsg(char *s)
 {
+    printf("EMSG: %s\n", s);
     /* Skip this if not giving error messages at the moment. */
     if (!emsg_not_now())
 	return emsg_core((char_u *)s);
diff --git a/src/testdir/test_assert.vim b/src/testdir/test_assert.vim
index 7df641c6a..0ab7287eb 100644
--- a/src/testdir/test_assert.vim
+++ b/src/testdir/test_assert.vim
@@ -1,7 +1,7 @@
 " Test that the methods used for testing work.
 
 func Test_assert_false()
-  call assert_equal(0, assert_false(0))
+  call assert_equal(900, assert_false(0))
   call assert_equal(0, assert_false(v:false))
 
   call assert_equal(1, assert_false(123))