diff --git a/gsk/gl/gskglrenderjob.c b/gsk/gl/gskglrenderjob.c
index 677e9e88ce..11d410a205 100644
--- a/gsk/gl/gskglrenderjob.c
+++ b/gsk/gl/gskglrenderjob.c
@@ -803,6 +803,8 @@ gsk_gl_render_job_untransform_bounds (GskGLRenderJob        *job,
 
   out_rect->origin.x -= job->offset_x;
   out_rect->origin.y -= job->offset_y;
+
+  gsk_transform_unref (transform);
 }
 
 static inline void
diff --git a/gsk/gskrendernodeimpl.c b/gsk/gskrendernodeimpl.c
index 3326a3086c..e2ccd3c336 100644
--- a/gsk/gskrendernodeimpl.c
+++ b/gsk/gskrendernodeimpl.c
@@ -5703,6 +5703,8 @@ gsk_mask_node_draw (GskRenderNode *node,
   cairo_clip (cr);
 
   cairo_mask (cr, mask_pattern);
+
+  cairo_pattern_destroy (mask_pattern);
 }
 
 static void
diff --git a/gsk/gskrendernodeparser.c b/gsk/gskrendernodeparser.c
index fc1e1cd422..ea54470c8c 100644
--- a/gsk/gskrendernodeparser.c
+++ b/gsk/gskrendernodeparser.c
@@ -2477,6 +2477,15 @@ printer_init (Printer       *self,
   printer_init_duplicates_for_node (self, node);
 }
 
+static void
+printer_clear (Printer *self)
+{
+  if (self->str)
+    g_string_free (self->str, TRUE);
+  g_hash_table_unref (self->named_nodes);
+  g_hash_table_unref (self->named_textures);
+}
+
 #define IDENT_LEVEL 2 /* Spaces per level */
 static void
 _indent (Printer *self)
@@ -3686,6 +3695,7 @@ GBytes *
 gsk_render_node_serialize (GskRenderNode *node)
 {
   Printer p;
+  GBytes *res;
 
   printer_init (&p, node);
 
@@ -3705,5 +3715,9 @@ gsk_render_node_serialize (GskRenderNode *node)
       render_node_print (&p, node);
     }
 
-  return g_string_free_to_bytes (p.str);
+  res = g_string_free_to_bytes (g_steal_pointer (&p.str));
+
+  printer_clear (&p);
+
+  return res;
 }
diff --git a/lsan.supp b/lsan.supp
index 32185fc61a..1fd29993a1 100644
--- a/lsan.supp
+++ b/lsan.supp
@@ -8,3 +8,4 @@ leak:libgio-2.0.so
 leak:libcairo.so
 leak:libpixman-1.so
 leak:librsvg-2.so
+leak:libxkbcommon.so
diff --git a/testsuite/gsk/compare-render.c b/testsuite/gsk/compare-render.c
index 9dcbe5ba8d..7ba25ad961 100644
--- a/testsuite/gsk/compare-render.c
+++ b/testsuite/gsk/compare-render.c
@@ -298,8 +298,12 @@ main (int argc, char **argv)
     {
       GskRenderNode *node2;
       GdkPixbuf *pixbuf, *pixbuf2;
+      GskTransform *transform;
+
+      transform = gsk_transform_scale (NULL, -1, 1);
+      node2 = gsk_transform_node_new (node, transform);
+      gsk_transform_unref (transform);
 
-      node2 = gsk_transform_node_new (node, gsk_transform_scale (NULL, -1, 1));
       save_node (node2, node_file, "-flipped.node");
 
       rendered_texture = gsk_renderer_render_texture (renderer, node2, NULL);
@@ -404,8 +408,12 @@ main (int argc, char **argv)
     {
       GskRenderNode *node2;
       GdkPixbuf *pixbuf, *pixbuf2;
+      GskTransform *transform;
+
+      transform = gsk_transform_rotate (NULL, 90);
+      node2 = gsk_transform_node_new (node, transform);
+      gsk_transform_unref (transform);
 
-      node2 = gsk_transform_node_new (node, gsk_transform_rotate (NULL, 90));
       save_node (node2, node_file, "-rotated.node");
 
       rendered_texture = gsk_renderer_render_texture (renderer, node2, NULL);