diff --git a/rostests/apitests/ntdll/NtContinue.c b/rostests/apitests/ntdll/NtContinue.c
index 8776bca59bf..1f619f1ffa6 100644
--- a/rostests/apitests/ntdll/NtContinue.c
+++ b/rostests/apitests/ntdll/NtContinue.c
@@ -123,6 +123,10 @@ void check(CONTEXT * pContext)
 
 START_TEST(NtContinue)
 {
+#ifdef __RUNTIME_CHECKS__
+    skip("This test breaks MSVC runtime checks!");
+    return;
+#endif /* __RUNTIME_CHECKS__ */
     initrand();
 
     /* First time */
diff --git a/rostests/apitests/user32/WndProc.c b/rostests/apitests/user32/WndProc.c
index 337f36586cf..bdcff2f8d57 100644
--- a/rostests/apitests/user32/WndProc.c
+++ b/rostests/apitests/user32/WndProc.c
@@ -99,5 +99,9 @@ static void test_wndproc(void)
 
 START_TEST(WndProc)
 {
+#ifdef __RUNTIME_CHECKS__
+    skip("This test breaks MSVC runtime checks!");
+    return;
+#endif /* __RUNTIME_CHECKS__ */
    test_wndproc();
 }
diff --git a/rostests/winetests/kernel32/volume.c b/rostests/winetests/kernel32/volume.c
index fd52a2a9274..191987c8ed0 100644
--- a/rostests/winetests/kernel32/volume.c
+++ b/rostests/winetests/kernel32/volume.c
@@ -765,6 +765,12 @@ static void test_GetVolumePathNamesForVolumeNameW(void)
     WCHAR volume[MAX_PATH], buffer[MAX_PATH];
     DWORD len, error;
 
+#ifdef __REACTOS__
+    /* due to failing all calls to GetVolumeNameForVolumeMountPointW, this
+     * buffer never gets initialized and could cause a buffer overflow later */
+    volume[0] = 0;
+#endif /* __REACTOS__ */
+
     if (!pGetVolumePathNamesForVolumeNameW || !pGetVolumeNameForVolumeMountPointW)
     {
         win_skip("required functions not found\n");