diff --git a/cfg/gtk.cfg b/cfg/gtk.cfg
index bddca522d..d86fec08e 100644
--- a/cfg/gtk.cfg
+++ b/cfg/gtk.cfg
@@ -16,6 +16,11 @@
   <define name="N_(string)" value="(string)"/>
   <define name="C_(context, string)" value="g_dpgettext (NULL, context &quot;\004&quot; string, strlen (context) + 1)"/>
   <define name="NC_(context, string)" value="(string)"/>
+  <define name="g_assert(expr)" value="assert(expr)"/>
+  <define name="g_assert_not_reached()" value="assert(NULL)"/>
+  <define name="g_signal_connect(instance, detailed_signal, c_handler, data)" value="g_signal_connect_data ((instance), (detailed_signal), (c_handler), (data), NULL, (GConnectFlags) 0)"/>
+  <define name="g_signal_connect_after(instance, detailed_signal, c_handler, data)" value="g_signal_connect_data ((instance), (detailed_signal), (c_handler), (data), NULL, G_CONNECT_AFTER)"/>
+  <define name="g_signal_connect_swapped(instance, detailed_signal, c_handler, data)" value="g_signal_connect_data ((instance), (detailed_signal), (c_handler), (data), NULL, G_CONNECT_SWAPPED)"/>
   <memory>
     <alloc init="true">g_thread_new</alloc>
     <alloc init="true">g_thread_try_new</alloc>
@@ -18095,6 +18100,41 @@
       <not-bool/>
     </arg>
   </function>
+  <!-- gchar * g_strdup_printf (const gchar *format, ...); -->
+  <function name="g_strdup_printf">
+    <noreturn>false</noreturn>
+    <returnValue type="gchar *"/>
+    <formatstr/>
+    <arg nr="1">
+      <formatstr/>
+      <not-null/>
+      <not-uninit/>
+    </arg>
+  </function>
+  <!-- gulong g_signal_connect_data (gpointer instance, const gchar *detailed_signal,
+                                     GCallback c_handler, gpointer data,
+                                     GClosureNotify destroy_data, GConnectFlags connect_flags); -->
+  <function name="g_signal_connect_data">
+    <noreturn>false</noreturn>
+    <returnValue type="gulong"/>
+    <arg nr="1">
+      <not-null/>
+      <not-uninit/>
+    </arg>
+    <arg nr="2">
+      <strz/>
+      <not-uninit/>
+    </arg>
+    <arg nr="3">
+      <not-uninit/>
+    </arg>
+    <arg nr="4"/>
+    <arg nr="5"/>
+    <arg nr="6">
+      <not-uninit/>
+      <not-bool/>
+    </arg>
+  </function>
   <define name="gchar" value="char"/>
   <define name="guchar" value="unsigned char"/>
   <define name="gint" value="int"/>
diff --git a/test/cfg/gtk.c b/test/cfg/gtk.c
index 766776589..c15e54011 100644
--- a/test/cfg/gtk.c
+++ b/test/cfg/gtk.c
@@ -27,6 +27,11 @@ void validCode(int argInt)
     gpointer gpt = g_malloc(4);
     printf("%p", gpt);
     g_free(gpt);
+    g_assert(gpt);
+    if (!gpt) {
+        // cppcheck-suppress checkLibraryNoReturn
+        g_assert_not_reached();
+    }
 }
 
 void g_malloc_test()
@@ -39,3 +44,11 @@ void g_malloc_test()
 
     // cppcheck-suppress memleak
 }
+
+void g_assert_test()
+{
+    int a;
+    // cppcheck-suppress checkLibraryNoReturn
+    // cppcheck-suppress assignmentInAssert
+    g_assert(a = 5);
+}