1 files changed, 3 insertions, 2 deletions

diff --git a/src/testing/testing.c b/src/testing/testing.c
index 852bae567..4e10d50e2 100644
--- a/src/testing/testing.c
+++ b/src/testing/testing.c
@@ -387,7 +387,7 @@ GNUNET_TESTING_system_create_with_portrange (const char *testdir,
 
   GNUNET_assert (NULL != testdir);
   system = GNUNET_malloc (sizeof (struct GNUNET_TESTING_System));
-  if (NULL != (system->tmppath = getenv ("GNUNET_TESTING_PREFIX")))
+  if (NULL == (system->tmppath = getenv ("GNUNET_TESTING_PREFIX")))
     system->tmppath = GNUNET_DISK_mkdtemp (testdir);
   else
     system->tmppath = GNUNET_strdup (system->tmppath);
@@ -434,7 +434,8 @@ GNUNET_TESTING_system_create_with_portrange (const char *testdir,
  *
  * @param testdir only the directory name without any path. This is used for all
  *          service homes; the directory will be created in a temporary location
- *          depending on the underlying OS
+ *          depending on the underlying OS.  This variable will be
+ *          overridden with the value of the environmental variable
  * @param trusted_ip the ip address which will be set as TRUSTED HOST in all
  *          service configurations generated to allow control connections from
  *          this ip. This can either be a single ip address or a network address