diff --git a/gio/tests/appinfo.c b/gio/tests/appinfo.c
index d9d61b605..ea4809d54 100644
--- a/gio/tests/appinfo.c
+++ b/gio/tests/appinfo.c
@@ -381,6 +381,7 @@ test_associations (void)
                                                 "cmdline-app-test",
                                                 G_APP_INFO_CREATE_SUPPORTS_URIS,
                                                 NULL);
+  g_free (cmdline);
 
   error = NULL;
   result = g_app_info_set_as_default_for_type (appinfo, "application/x-glib-test", &error);
diff --git a/gio/tests/dbus-appinfo.c b/gio/tests/dbus-appinfo.c
index ee73d5833..8961a5495 100644
--- a/gio/tests/dbus-appinfo.c
+++ b/gio/tests/dbus-appinfo.c
@@ -254,11 +254,14 @@ test_dbus_appinfo (void)
   const gchar *argv[] = { "myapp", NULL };
   TestApplication *app;
   int status;
+  gchar *desktop_file = NULL;
 
-  appinfo = g_desktop_app_info_new_from_filename (g_test_build_filename (G_TEST_DIST,
-                                                                         "org.gtk.test.dbusappinfo.desktop",
-                                                                         NULL));
+  desktop_file = g_test_build_filename (G_TEST_DIST,
+                                        "org.gtk.test.dbusappinfo.desktop",
+                                        NULL);
+  appinfo = g_desktop_app_info_new_from_filename (desktop_file);
   g_assert (appinfo != NULL);
+  g_free (desktop_file);
 
   app = g_object_new (test_application_get_type (),
                       "application-id", "org.gtk.test.dbusappinfo",
diff --git a/gio/tests/desktop-app-info.c b/gio/tests/desktop-app-info.c
index 639b27e18..4871d85a5 100644
--- a/gio/tests/desktop-app-info.c
+++ b/gio/tests/desktop-app-info.c
@@ -93,6 +93,8 @@ test_delete (void)
       res = g_app_info_delete (info);
       g_assert (!res);
     }
+
+  g_free (filename);
 }
 
 static void
@@ -115,6 +117,7 @@ test_default (void)
   info = g_app_info_get_default_for_type ("application/x-test", FALSE);
   g_assert (info != NULL);
   g_assert_cmpstr (g_app_info_get_id (info), ==, g_app_info_get_id (info2));
+  g_object_unref (info);
 
   /* now try adding something, but not setting as default */
   g_app_info_add_supports_type (info3, "application/x-test", &error);
@@ -124,6 +127,7 @@ test_default (void)
   info = g_app_info_get_default_for_type ("application/x-test", FALSE);
   g_assert (info != NULL);
   g_assert_cmpstr (g_app_info_get_id (info), ==, g_app_info_get_id (info2));
+  g_object_unref (info);
 
   /* now remove info1 again */
   g_app_info_remove_supports_type (info1, "application/x-test", &error);
@@ -133,6 +137,7 @@ test_default (void)
   info = g_app_info_get_default_for_type ("application/x-test", FALSE);
   g_assert (info != NULL);
   g_assert_cmpstr (g_app_info_get_id (info), ==, g_app_info_get_id (info2));
+  g_object_unref (info);
 
   /* now clean it all up */
   g_app_info_reset_type_associations ("application/x-test");
@@ -146,6 +151,7 @@ test_default (void)
 
   g_object_unref (info1);
   g_object_unref (info2);
+  g_object_unref (info3);
 }
 
 static void
@@ -324,6 +330,8 @@ cleanup_dir_recurse (GFile   *parent,
 
   ret = TRUE;
  out:
+  g_clear_object (&enumerator);
+
   return ret;
 }
 
@@ -342,6 +350,7 @@ cleanup_subdirs (const char *base_dir)
   (void) cleanup_dir_recurse (file, file, &error);
   g_assert_no_error (error);
   g_object_unref (file);
+  g_object_unref (base);
 }
 
 static void
diff --git a/gio/tests/g-file-info-filesystem-readonly.c b/gio/tests/g-file-info-filesystem-readonly.c
index c2b0aa518..123dcd8a0 100644
--- a/gio/tests/g-file-info-filesystem-readonly.c
+++ b/gio/tests/g-file-info-filesystem-readonly.c
@@ -45,6 +45,8 @@ test_filesystem_readonly (gconstpointer with_mount_monitor)
     {
       /* We need these because "mount --bind" requires root privileges */
       g_test_skip ("'bindfs' and 'fusermount' commands are needed to run this test");
+      g_free (fusermount);
+      g_free (bindfs);
       return;
     }
 
diff --git a/gio/tests/gdbus-peer-object-manager.c b/gio/tests/gdbus-peer-object-manager.c
index 933cc529d..676c9f080 100644
--- a/gio/tests/gdbus-peer-object-manager.c
+++ b/gio/tests/gdbus-peer-object-manager.c
@@ -258,6 +258,8 @@ setup (Test *test,
 
   g_assert (test->server);
   g_assert (test->client);
+
+  g_object_unref (stream);
 }
 
 static void
diff --git a/gio/tests/gdbus-peer.c b/gio/tests/gdbus-peer.c
index 101c2a8bb..7f35baae6 100644
--- a/gio/tests/gdbus-peer.c
+++ b/gio/tests/gdbus-peer.c
@@ -875,6 +875,7 @@ test_peer (void)
                       getuid ());
     g_assert_cmpuint (g_credentials_get_unix_pid (credentials, NULL), ==,
                       getpid ());
+    g_object_unref (credentials);
 #else
     g_assert_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED);
     g_assert (credentials == NULL);
@@ -1358,6 +1359,8 @@ test_nonce_tcp (void)
 
   g_main_loop_quit (service_loop);
   g_thread_join (service_thread);
+
+  g_ptr_array_unref (data.current_connections);
 }
 
 static void
@@ -1711,6 +1714,7 @@ codegen_test_peer (void)
    * change notifications anyway because those are done from an idle handler
    */
   example_animal_call_poke_sync (animal2, TRUE, TRUE, NULL, &error);
+  g_clear_error (&error);
 
   g_object_unref (animal1);
   g_object_unref (animal2);
diff --git a/gio/tests/resources.c b/gio/tests/resources.c
index 8163aa141..5d2e27474 100644
--- a/gio/tests/resources.c
+++ b/gio/tests/resources.c
@@ -547,7 +547,8 @@ test_uri_query_info (void)
   GBytes *data;
   GFile *file;
   GFileInfo *info;
-  const char *content_type, *mime_type;
+  const char *content_type;
+  gchar *mime_type = NULL;
   const char *fs_type;
   gboolean readonly;
 
@@ -573,6 +574,7 @@ test_uri_query_info (void)
   mime_type = g_content_type_get_mime_type (content_type);
   g_assert (mime_type);
   g_assert_cmpstr (mime_type, ==, "text/plain");
+  g_free (mime_type);
 
   g_object_unref (info);
 
diff --git a/gio/tests/simple-proxy.c b/gio/tests/simple-proxy.c
index f1eb6af9b..ffc16eddd 100644
--- a/gio/tests/simple-proxy.c
+++ b/gio/tests/simple-proxy.c
@@ -77,6 +77,7 @@ test_uris (void)
   g_assert_cmpstr (error->message, ==, str);
   g_clear_error (&error);
   g_assert_null (proxies);
+  g_object_unref (result);
 
   g_object_unref (resolver);
   g_free (str);
diff --git a/gio/tests/task.c b/gio/tests/task.c
index 08d78e5ef..934262e40 100644
--- a/gio/tests/task.c
+++ b/gio/tests/task.c
@@ -1902,6 +1902,7 @@ legacy_error_callback (GObject      *object,
 
       g_assert_error (error, G_IO_ERROR, G_IO_ERROR_FAILED);
       *result_out = -2;
+      g_clear_error (&error);
     }
   else
     {
diff --git a/gio/tests/unix-streams.c b/gio/tests/unix-streams.c
index dafaf66aa..67a90d83d 100644
--- a/gio/tests/unix-streams.c
+++ b/gio/tests/unix-streams.c
@@ -178,6 +178,7 @@ main_thread_read (GObject *source, GAsyncResult *res, gpointer user_data)
   if (g_cancellable_is_cancelled (main_cancel))
     {
       do_main_cancel (out);
+      g_clear_error (&err);
       return;
     }
 
@@ -214,6 +215,7 @@ main_thread_wrote (GObject *source, GAsyncResult *res, gpointer user_data)
   if (g_cancellable_is_cancelled (main_cancel))
     {
       do_main_cancel (out);
+      g_clear_error (&err);
       return;
     }