diff --git a/subprojects/gstreamer/libs/gst/check/gstcheck.c b/subprojects/gstreamer/libs/gst/check/gstcheck.c
index 0b6b22d769..3ff00be8b1 100644
--- a/subprojects/gstreamer/libs/gst/check/gstcheck.c
+++ b/subprojects/gstreamer/libs/gst/check/gstcheck.c
@@ -99,7 +99,7 @@ gst_check_alloc_log_filter (const gchar * log_domain, GLogLevelFlags log_level,
 {
   GstCheckLogFilter *filter;
 
-  filter = g_slice_new (GstCheckLogFilter);
+  filter = g_new (GstCheckLogFilter, 1);
   filter->log_domain = g_strdup (log_domain);
   filter->log_level = log_level;
   filter->regex = regex;
@@ -120,7 +120,7 @@ gst_check_free_log_filter (GstCheckLogFilter * filter)
   g_regex_unref (filter->regex);
   if (filter->destroy)
     filter->destroy (filter->user_data);
-  g_slice_free (GstCheckLogFilter, filter);
+  g_free (filter);
 }
 
 
@@ -1271,7 +1271,7 @@ gst_check_objects_destroyed_on_unref (gpointer object_to_unref,
 {
   GObject *object;
   GList *objs = NULL, *tmp;
-  DestroyedObjectStruct *destroyed = g_slice_new0 (DestroyedObjectStruct);
+  DestroyedObjectStruct *destroyed = g_new0 (DestroyedObjectStruct, 1);
 
   destroyed->object = object_to_unref;
   g_object_weak_ref (object_to_unref, (GWeakNotify) weak_notify, destroyed);
@@ -1284,7 +1284,7 @@ gst_check_objects_destroyed_on_unref (gpointer object_to_unref,
 
     va_start (varargs, first_object);
     while (object) {
-      destroyed = g_slice_new0 (DestroyedObjectStruct);
+      destroyed = g_new0 (DestroyedObjectStruct, 1);
       destroyed->object = object;
       g_object_weak_ref (object, (GWeakNotify) weak_notify, destroyed);
       objs = g_list_prepend (objs, destroyed);
@@ -1305,7 +1305,7 @@ gst_check_objects_destroyed_on_unref (gpointer object_to_unref,
           G_OBJECT_TYPE_NAME (destroyed), destroyed->object,
           destroyed->object->ref_count);
     }
-    g_slice_free (DestroyedObjectStruct, tmp->data);
+    g_free (tmp->data);
   }
   g_list_free (objs);
 }
diff --git a/subprojects/gstreamer/libs/gst/check/gstharness.c b/subprojects/gstreamer/libs/gst/check/gstharness.c
index 295b66fe70..932e915959 100644
--- a/subprojects/gstreamer/libs/gst/check/gstharness.c
+++ b/subprojects/gstreamer/libs/gst/check/gstharness.c
@@ -2898,13 +2898,13 @@ gst_harness_thread_init (GstHarnessThread * t, GDestroyNotify freefunc,
 static void
 gst_harness_thread_free (GstHarnessThread * t)
 {
-  g_slice_free (GstHarnessThread, t);
+  g_free (t);
 }
 
 static void
 gst_harness_custom_thread_free (GstHarnessCustomThread * t)
 {
-  g_slice_free (GstHarnessCustomThread, t);
+  g_free (t);
 }
 
 static void
@@ -2914,7 +2914,7 @@ gst_harness_push_buffer_thread_free (GstHarnessPushBufferThread * t)
     gst_caps_replace (&t->caps, NULL);
     if (t->notify != NULL)
       t->notify (t->data);
-    g_slice_free (GstHarnessPushBufferThread, t);
+    g_free (t);
   }
 }
 
@@ -2924,7 +2924,7 @@ gst_harness_push_event_thread_free (GstHarnessPushEventThread * t)
   if (t != NULL) {
     if (t->notify != NULL)
       t->notify (t->data);
-    g_slice_free (GstHarnessPushEventThread, t);
+    g_free (t);
   }
 }
 
@@ -2934,7 +2934,7 @@ gst_harness_property_thread_free (GstHarnessPropThread * t)
   if (t != NULL) {
     g_free (t->name);
     g_value_unset (&t->value);
-    g_slice_free (GstHarnessPropThread, t);
+    g_free (t);
   }
 }
 
@@ -2963,7 +2963,7 @@ gst_harness_requestpad_thread_free (GstHarnessReqPadThread * t)
     gst_caps_replace (&t->caps, NULL);
 
     gst_harness_requestpad_release_pads (t);
-    g_slice_free (GstHarnessReqPadThread, t);
+    g_free (t);
   }
 }
 
@@ -3209,7 +3209,7 @@ GstHarnessThread *
 gst_harness_stress_custom_start (GstHarness * h,
     GFunc init, GFunc callback, gpointer data, gulong sleep)
 {
-  GstHarnessCustomThread *t = g_slice_new0 (GstHarnessCustomThread);
+  GstHarnessCustomThread *t = g_new0 (GstHarnessCustomThread, 1);
   gst_harness_thread_init (&t->t,
       (GDestroyNotify) gst_harness_custom_thread_free, h, sleep);
 
@@ -3239,7 +3239,7 @@ gst_harness_stress_custom_start (GstHarness * h,
 GstHarnessThread *
 gst_harness_stress_statechange_start_full (GstHarness * h, gulong sleep)
 {
-  GstHarnessThread *t = g_slice_new0 (GstHarnessThread);
+  GstHarnessThread *t = g_new0 (GstHarnessThread, 1);
   gst_harness_thread_init (t,
       (GDestroyNotify) gst_harness_thread_free, h, sleep);
   GST_HARNESS_THREAD_START (statechange, t);
@@ -3312,7 +3312,7 @@ gst_harness_stress_push_buffer_with_cb_start_full (GstHarness * h,
     GstHarnessPrepareBufferFunc func, gpointer data, GDestroyNotify notify,
     gulong sleep)
 {
-  GstHarnessPushBufferThread *t = g_slice_new0 (GstHarnessPushBufferThread);
+  GstHarnessPushBufferThread *t = g_new0 (GstHarnessPushBufferThread, 1);
   gst_harness_thread_init (&t->t,
       (GDestroyNotify) gst_harness_push_buffer_thread_free, h, sleep);
 
@@ -3375,7 +3375,7 @@ gst_harness_stress_push_event_with_cb_start_full (GstHarness * h,
     GstHarnessPrepareEventFunc func, gpointer data, GDestroyNotify notify,
     gulong sleep)
 {
-  GstHarnessPushEventThread *t = g_slice_new0 (GstHarnessPushEventThread);
+  GstHarnessPushEventThread *t = g_new0 (GstHarnessPushEventThread, 1);
   gst_harness_thread_init (&t->t,
       (GDestroyNotify) gst_harness_push_event_thread_free, h, sleep);
 
@@ -3436,7 +3436,7 @@ gst_harness_stress_push_upstream_event_with_cb_start_full (GstHarness * h,
     GstHarnessPrepareEventFunc func, gpointer data, GDestroyNotify notify,
     gulong sleep)
 {
-  GstHarnessPushEventThread *t = g_slice_new0 (GstHarnessPushEventThread);
+  GstHarnessPushEventThread *t = g_new0 (GstHarnessPushEventThread, 1);
   gst_harness_thread_init (&t->t,
       (GDestroyNotify) gst_harness_push_event_thread_free, h, sleep);
 
@@ -3468,7 +3468,7 @@ GstHarnessThread *
 gst_harness_stress_property_start_full (GstHarness * h,
     const gchar * name, const GValue * value, gulong sleep)
 {
-  GstHarnessPropThread *t = g_slice_new0 (GstHarnessPropThread);
+  GstHarnessPropThread *t = g_new0 (GstHarnessPropThread, 1);
   gst_harness_thread_init (&t->t,
       (GDestroyNotify) gst_harness_property_thread_free, h, sleep);
 
@@ -3503,7 +3503,7 @@ gst_harness_stress_requestpad_start_full (GstHarness * h,
     GstPadTemplate * templ, const gchar * name, GstCaps * caps,
     gboolean release, gulong sleep)
 {
-  GstHarnessReqPadThread *t = g_slice_new0 (GstHarnessReqPadThread);
+  GstHarnessReqPadThread *t = g_new0 (GstHarnessReqPadThread, 1);
   gst_harness_thread_init (&t->t,
       (GDestroyNotify) gst_harness_requestpad_thread_free, h, sleep);
 
diff --git a/subprojects/gstreamer/libs/gst/check/gsttestclock.c b/subprojects/gstreamer/libs/gst/check/gsttestclock.c
index 7d6849f1e4..6223732642 100644
--- a/subprojects/gstreamer/libs/gst/check/gsttestclock.c
+++ b/subprojects/gstreamer/libs/gst/check/gsttestclock.c
@@ -556,7 +556,7 @@ gst_test_clock_add_entry (GstTestClock * test_clock,
   if (jitter != NULL)
     *jitter = GST_CLOCK_DIFF (GST_CLOCK_ENTRY_TIME (entry), now);
 
-  ctx = g_slice_new (GstClockEntryContext);
+  ctx = g_new (GstClockEntryContext, 1);
   ctx->clock_entry = GST_CLOCK_ENTRY (gst_clock_id_ref (entry));
   ctx->time_diff = GST_CLOCK_DIFF (now, GST_CLOCK_ENTRY_TIME (entry));
 
@@ -576,7 +576,7 @@ gst_test_clock_remove_entry (GstTestClock * test_clock, GstClockEntry * entry)
   if (ctx != NULL) {
     gst_clock_id_unref (ctx->clock_entry);
     priv->entry_contexts = g_list_remove (priv->entry_contexts, ctx);
-    g_slice_free (GstClockEntryContext, ctx);
+    g_free (ctx);
 
     g_cond_broadcast (&priv->entry_processed_cond);
   }