diff --git a/gdk/gdkframeclockidle.c b/gdk/gdkframeclockidle.c
index 606a31d6ba..d988f0da22 100644
--- a/gdk/gdkframeclockidle.c
+++ b/gdk/gdkframeclockidle.c
@@ -589,7 +589,10 @@ gdk_frame_clock_paint_idle (void *data)
                 {
                   if (priv->phase != GDK_FRAME_CLOCK_PHASE_LAYOUT &&
                       (priv->requested & GDK_FRAME_CLOCK_PHASE_LAYOUT))
-                    timings->layout_start_time = g_get_monotonic_time ();
+                    {
+                      if (timings)
+                        timings->layout_start_time = g_get_monotonic_time ();
+                    }
                 }
 
               priv->phase = GDK_FRAME_CLOCK_PHASE_LAYOUT;
@@ -618,7 +621,10 @@ gdk_frame_clock_paint_idle (void *data)
                 {
                   if (priv->phase != GDK_FRAME_CLOCK_PHASE_PAINT &&
                       (priv->requested & GDK_FRAME_CLOCK_PHASE_PAINT))
-                    timings->paint_start_time = g_get_monotonic_time ();
+                    {
+                      if (timings)
+                        timings->paint_start_time = g_get_monotonic_time ();
+                    }
                 }
 
               priv->phase = GDK_FRAME_CLOCK_PHASE_PAINT;
diff --git a/gsk/gskpathbuilder.c b/gsk/gskpathbuilder.c
index ebb5a9dcf7..9dafa15cb2 100644
--- a/gsk/gskpathbuilder.c
+++ b/gsk/gskpathbuilder.c
@@ -1414,7 +1414,6 @@ gsk_path_builder_svg_arc_to (GskPathBuilder *self,
 
   n_segs = ceil (fabs (delta_theta / (M_PI_2 + 0.001)));
   d_theta = delta_theta / n_segs;
-  theta = theta1;
   _sincos (theta1, &sin_th1, &cos_th1);
 
   th_half = d_theta / 2;
diff --git a/tests/testlistview.c b/tests/testlistview.c
index d29ad88a06..cab7bc9a7e 100644
--- a/tests/testlistview.c
+++ b/tests/testlistview.c
@@ -553,7 +553,6 @@ update_statusbar (GtkStatusbar *statusbar)
       g_string_append_printf (string, " (%u directories remaining)", active + g_slist_length (pending));
       result = G_SOURCE_CONTINUE;
     }
-      result = G_SOURCE_CONTINUE;
 
   gtk_statusbar_push (statusbar, 0, string->str);
   g_free (string->str);
diff --git a/testsuite/gsk/replay-node.c b/testsuite/gsk/replay-node.c
index ae03794d39..b676e8d13f 100644
--- a/testsuite/gsk/replay-node.c
+++ b/testsuite/gsk/replay-node.c
@@ -38,7 +38,7 @@ replay_linear_gradient_node (GskRenderNode *node, GtkSnapshot *snapshot)
   graphene_rect_t bounds;
   const graphene_point_t *start_point, *end_point;
   const GskColorStop *stops;
-  gsize n_stops;
+  gsize n_stops = 0;
 
   gsk_render_node_get_bounds (node, &bounds);
   start_point = gsk_linear_gradient_node_get_start (node);
@@ -65,7 +65,7 @@ replay_radial_gradient_node (GskRenderNode *node, GtkSnapshot *snapshot)
   float vradius = gsk_radial_gradient_node_get_vradius (node);
   float start = gsk_radial_gradient_node_get_start (node);
   float end = gsk_radial_gradient_node_get_end (node);
-  gsize n_stops;
+  gsize n_stops = 0;
   const GskColorStop *stops = gsk_radial_gradient_node_get_color_stops (node,
                                                                         &n_stops);
 
@@ -86,7 +86,7 @@ replay_conic_gradient_node (GskRenderNode *node, GtkSnapshot *snapshot)
   gsk_render_node_get_bounds (node, &bounds);
   const graphene_point_t *center = gsk_conic_gradient_node_get_center (node);
   float rotation = gsk_conic_gradient_node_get_rotation (node);
-  gsize n_stops;
+  gsize n_stops = 0;
   const GskColorStop *stops = gsk_conic_gradient_node_get_color_stops (node,
                                                                        &n_stops);
 
diff --git a/testsuite/gtk/builder.c b/testsuite/gtk/builder.c
index f3a7007337..2a9895b203 100644
--- a/testsuite/gtk/builder.c
+++ b/testsuite/gtk/builder.c
@@ -2000,7 +2000,6 @@ test_pango_attributes (void)
   /* Test errors are set */
   builder = gtk_builder_new ();
   gtk_builder_add_from_string (builder, err_buffer1, -1, &error);
-  label = gtk_builder_get_object (builder, "label1");
   g_assert_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_MISSING_ATTRIBUTE);
   g_object_unref (builder);
   g_error_free (error);
@@ -2008,8 +2007,6 @@ test_pango_attributes (void)
 
   builder = gtk_builder_new ();
   gtk_builder_add_from_string (builder, err_buffer2, -1, &error);
-  label = gtk_builder_get_object (builder, "label1");
-
   g_assert_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE);
   g_object_unref (builder);
   g_error_free (error);
diff --git a/testsuite/gtk/label.c b/testsuite/gtk/label.c
index fa0687cf49..5ff621c490 100644
--- a/testsuite/gtk/label.c
+++ b/testsuite/gtk/label.c
@@ -46,7 +46,10 @@ print_attribute (PangoAttribute *attr, GString *string)
       g_free (text);
     }
   else if ((shape = pango_attribute_as_shape (attr)) != NULL)
-    g_string_append_printf (string, "shape");
+    {
+      g_assert_true (shape != NULL);
+      g_string_append_printf (string, "shape");
+    }
   else
     g_assert_not_reached ();
 }