--- a/tests.c	Thu Feb 25 11:59:06 2016 +0200
+++ b/tests.c	Thu Feb 25 12:19:10 2016 +0200
@@ -12,6 +12,7 @@
 typedef struct
 {
     char *header, *res;
+    BOOL shown;
 } test_ctx;
 
 
@@ -33,19 +34,26 @@
 static const int arg_nopts = sizeof(arg_opts) / sizeof(arg_opts[0]);
 
 
-void tprintv(const int level, const char *fmt, va_list ap)
+BOOL tprintv(const int level, const char *fmt, va_list ap)
 {
     if (level <= th_verbosityLevel)
+    {
         vfprintf(stdout, fmt, ap);
+        return TRUE;
+    }
+    else
+        return FALSE;
 }
 
 
-void tprint(const int level, const char *fmt, ...)
+BOOL tprint(const int level, const char *fmt, ...)
 {
+    BOOL retv;
     va_list ap;
     va_start(ap, fmt);
-    tprintv(level, fmt, ap);
+    retv = tprintv(level, fmt, ap);
     va_end(ap);
+    return retv;
 }
 
 
@@ -146,12 +154,16 @@
 {
     if (check)
     {
-        tprint(2, "%s: OK\n", ctx->header);
+        if (!ctx->shown && tprint(2, "%s: OK\n", ctx->header))
+            ctx->shown = TRUE;
+
         tests_passed++;
     }
     else
     {
-        tprint(0, "%s: FAIL\n", ctx->header);
+        if (!ctx->shown && tprint(0, "%s: FAIL\n", ctx->header))
+            ctx->shown = TRUE;
+
         if (fmt != NULL)
         {
             tprint(0, "  - ");