diff --git a/configure b/configure
index e14a35b5266..2ffbfd8520c 100755
--- a/configure
+++ b/configure
@@ -22205,6 +22205,7 @@ wine_fn_config_makefile dlls/wlanui enable_wlanui
 wine_fn_config_makefile dlls/wldap32 enable_wldap32
 wine_fn_config_makefile dlls/wldap32/tests enable_tests
 wine_fn_config_makefile dlls/wldp enable_wldp
+wine_fn_config_makefile dlls/wldp/tests enable_tests
 wine_fn_config_makefile dlls/wmasf enable_wmasf
 wine_fn_config_makefile dlls/wmi enable_wmi
 wine_fn_config_makefile dlls/wmiutils enable_wmiutils
diff --git a/configure.ac b/configure.ac
index 154e0ee06aa..aba623ee6e7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3247,6 +3247,7 @@ WINE_CONFIG_MAKEFILE(dlls/wlanui)
 WINE_CONFIG_MAKEFILE(dlls/wldap32)
 WINE_CONFIG_MAKEFILE(dlls/wldap32/tests)
 WINE_CONFIG_MAKEFILE(dlls/wldp)
+WINE_CONFIG_MAKEFILE(dlls/wldp/tests)
 WINE_CONFIG_MAKEFILE(dlls/wmasf)
 WINE_CONFIG_MAKEFILE(dlls/wmi)
 WINE_CONFIG_MAKEFILE(dlls/wmiutils)
diff --git a/dlls/wldp/tests/Makefile.in b/dlls/wldp/tests/Makefile.in
new file mode 100644
index 00000000000..3271c17dad2
--- /dev/null
+++ b/dlls/wldp/tests/Makefile.in
@@ -0,0 +1,4 @@
+TESTDLL   = wldp.dll
+
+SOURCES = \
+	wldp.c
diff --git a/dlls/wldp/tests/wldp.c b/dlls/wldp/tests/wldp.c
new file mode 100644
index 00000000000..4a41f1e9407
--- /dev/null
+++ b/dlls/wldp/tests/wldp.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2023 Hans Leidekker for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <stdarg.h>
+
+#include "windef.h"
+#include "winbase.h"
+#include "wldp.h"
+
+#include "wine/test.h"
+
+static HRESULT (WINAPI *pWldpGetLockdownPolicy)(WLDP_HOST_INFORMATION *, DWORD *, DWORD);
+static HRESULT (WINAPI *pWldpQueryWindowsLockdownMode)(WLDP_WINDOWS_LOCKDOWN_MODE *);
+
+static void test_WldpGetLockdownPolicy(void)
+{
+    WLDP_HOST_INFORMATION info;
+    DWORD state;
+    HRESULT hr;
+
+    if (!pWldpGetLockdownPolicy)
+    {
+        win_skip( "WldpGetLockdownPolicy not available\n" );
+        return;
+    }
+
+    state = 0xdeadbeef;
+    hr = pWldpGetLockdownPolicy( NULL, &state, 0 );
+    ok( hr == 0x10000000, "got %#lx\n", hr );
+    ok( state == WLDP_LOCKDOWN_DEFINED_FLAG, "got %#lx\n", state );
+
+    memset( &info, 0, sizeof(info) );
+    info.dwRevision = 1;
+    info.dwHostId = WLDP_HOST_ID_GLOBAL;
+    state = 0xdeadbeef;
+    hr = pWldpGetLockdownPolicy( &info, &state, 0 );
+    ok( hr == S_OK, "got %#lx\n", hr );
+    ok( state == WLDP_LOCKDOWN_DEFINED_FLAG, "got %#lx\n", state );
+}
+
+static void test_WldpQueryWindowsLockdownMode(void)
+{
+    WLDP_WINDOWS_LOCKDOWN_MODE mode;
+    HRESULT hr;
+
+    if (!pWldpQueryWindowsLockdownMode)
+    {
+        win_skip( "WldpQueryWindowsLockdownMode not available\n" );
+        return;
+    }
+
+    mode = 0xdeadbeef;
+    hr = pWldpQueryWindowsLockdownMode( &mode );
+    ok( hr == S_OK, "got %#lx\n", hr );
+    ok( mode == WLDP_WINDOWS_LOCKDOWN_MODE_UNLOCKED, "got %u\n", mode );
+}
+
+START_TEST(wldp)
+{
+    HMODULE hwldp = LoadLibraryW( L"wldp" );
+
+    pWldpGetLockdownPolicy = (void *)GetProcAddress( hwldp, "WldpGetLockdownPolicy" );
+    pWldpQueryWindowsLockdownMode = (void *)GetProcAddress( hwldp, "WldpQueryWindowsLockdownMode" );
+
+    test_WldpGetLockdownPolicy();
+    test_WldpQueryWindowsLockdownMode();
+}
diff --git a/dlls/wldp/wldp.c b/dlls/wldp/wldp.c
index 0c2fd0c4b70..25c85c68304 100644
--- a/dlls/wldp/wldp.c
+++ b/dlls/wldp/wldp.c
@@ -44,9 +44,10 @@ HRESULT WINAPI WldpIsDynamicCodePolicyEnabled(BOOL *is_enabled)
  */
 HRESULT WINAPI WldpGetLockdownPolicy(WLDP_HOST_INFORMATION *info, DWORD *state, DWORD flags)
 {
-    FIXME("%p %p %lu\n", info, state, flags);
+    FIXME("%p %p %lx\n", info, state, flags);
 
-    *state = 0;
+    *state = WLDP_LOCKDOWN_DEFINED_FLAG;
+    if (!info) return HRESULT_FROM_NT(0);
     return S_OK;
 }
 
diff --git a/include/wldp.h b/include/wldp.h
index 93f246fffa4..262e917b5bc 100644
--- a/include/wldp.h
+++ b/include/wldp.h
@@ -19,6 +19,14 @@
 #ifndef WLDP_H
 #define WLDP_H
 
+#define WLDP_LOCKDOWN_UNDEFINED             0x00000000
+#define WLDP_LOCKDOWN_DEFINED_FLAG          0x80000000
+#define WLDP_LOCKDOWN_CONFIG_CI_FLAG        0x00000001
+#define WLDP_LOCKDOWN_CONFIG_CI_AUDIT_FLAG  0x00000002
+#define WLDP_LOCKDOWN_UMCIENFORCE_FLAG      0x00000004
+#define WLDP_LOCKDOWN_AUDIT_FLAG            0x00000008
+#define WLDP_LOCKDOWN_EXCLUSION_FLAG        0x00000010
+
 typedef enum WLDP_HOST_ID
 {
   WLDP_HOST_ID_UNKNOWN,
@@ -50,5 +58,6 @@ typedef struct WLDP_HOST_INFORMATION
 
 HRESULT WINAPI WldpGetLockdownPolicy(WLDP_HOST_INFORMATION*,DWORD*,DWORD);
 HRESULT WINAPI WldpIsDynamicCodePolicyEnabled(BOOL*);
+HRESULT WINAPI WldpQueryWindowsLockdownMode(WLDP_WINDOWS_LOCKDOWN_MODE*);
 
 #endif