diff --git a/gtk.supp b/gtk.supp
index 1211eeea2c..927d6f102b 100644
--- a/gtk.supp
+++ b/gtk.supp
@@ -285,3 +285,11 @@
   ...
   fun:g_intern_static_string
 }
+
+# Threads
+{
+   pthread
+   Memcheck:Leak
+   fun:calloc
+   fun:_dl_allocate_tls
+}
diff --git a/gtk/gtkcssprovider.c b/gtk/gtkcssprovider.c
index 3b1caa7125..43882cf385 100644
--- a/gtk/gtkcssprovider.c
+++ b/gtk/gtkcssprovider.c
@@ -1052,6 +1052,8 @@ gtk_css_provider_load_internal (GtkCssProvider *self,
                                     "Failed to import: %s",
                                     load_error->message);
             }
+
+          g_error_free (load_error);
         }
     }
 
diff --git a/lsan.supp b/lsan.supp
index dddb9b91f6..32185fc61a 100644
--- a/lsan.supp
+++ b/lsan.supp
@@ -7,3 +7,4 @@ leak:libglib-2.0.so
 leak:libgio-2.0.so
 leak:libcairo.so
 leak:libpixman-1.so
+leak:librsvg-2.so
diff --git a/testsuite/gdk/pixbuf.c b/testsuite/gdk/pixbuf.c
index 592f5d0d32..591444fd86 100644
--- a/testsuite/gdk/pixbuf.c
+++ b/testsuite/gdk/pixbuf.c
@@ -1,31 +1,42 @@
 #include <gdk-pixbuf/gdk-pixbuf.h>
 
+static void
+test_format (gconstpointer d)
+{
+  const char *f = d;
+  GSList *formats;
+  gboolean found;
+
+  found = FALSE;
+
+  formats = gdk_pixbuf_get_formats ();
+
+  for (GSList *l = formats; l && !found; l = l->next)
+    {
+      GdkPixbufFormat *format = l->data;
+      char *name;
+
+      name = gdk_pixbuf_format_get_name (format);
+
+      if (strcmp (name, f) == 0)
+        found = TRUE;
+
+      g_free (name);
+    }
+
+  g_slist_free (formats);
+
+  g_assert_true (found);
+}
+
+
 int
 main (int argc, char *argv[])
 {
-  GSList *formats;
-  gboolean have_png, have_jpeg;
+  g_test_init (&argc, &argv, NULL);
 
-  have_png = FALSE;
-  have_jpeg = FALSE;
+  g_test_add_data_func ("/pixbuf/format/png", "png", test_format);
+  g_test_add_data_func ("/pixbuf/format/jpeg", "jpeg", test_format);
 
-  formats = gdk_pixbuf_get_formats ();
-
-  for (GSList *l = formats; l; l = l->next)
-    {
-      GdkPixbufFormat *format = l->data;
-      const char *name;
-
-      name = gdk_pixbuf_format_get_name (format);
-
-      if (strcmp (name, "png") == 0)
-        have_png = TRUE;
-      else if (strcmp (name, "jpeg") == 0)
-        have_jpeg = TRUE;
-    }
-
-  if (!have_png || !have_jpeg)
-    return 1;
-
-  return 0;
+  return g_test_run ();
 }
diff --git a/testsuite/gtk/bitset.c b/testsuite/gtk/bitset.c
index 110dc1401e..2c01912317 100644
--- a/testsuite/gtk/bitset.c
+++ b/testsuite/gtk/bitset.c
@@ -553,6 +553,9 @@ test_splice_overflow (void)
 
   compare = gtk_bitset_new_range (16, 1);
   g_assert_true (gtk_bitset_equals (set, compare));
+
+  gtk_bitset_unref (compare);
+  gtk_bitset_unref (set);
 }
 
 int
diff --git a/testsuite/gtk/stringlist.c b/testsuite/gtk/stringlist.c
index 63a1f6def4..93e9720d2c 100644
--- a/testsuite/gtk/stringlist.c
+++ b/testsuite/gtk/stringlist.c
@@ -167,7 +167,7 @@ test_create_builder (void)
   list = GTK_STRING_LIST (gtk_builder_get_object (builder, "list"));
   assert_model (list, "a b c");
 
-  g_object_unref (list);
+  g_object_unref (builder);
 }
 
 static void