diff --git a/appveyor.yml b/appveyor.yml
index 8d905103..886d1d51 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -22,5 +22,5 @@ build_script:
 
 test_script:
 - for %%f in ("build\VStudio\build\%CONFIGURATION%\winfsp-*.msi") do start /wait msiexec /i %%f /qn INSTALLLEVEL=1000
-- build\VStudio\build\%CONFIGURATION%\winfsp-tests-x64.exe -lock*
-- build\VStudio\build\%CONFIGURATION%\winfsp-tests-x86.exe -lock*
+- build\VStudio\build\%CONFIGURATION%\winfsp-tests-x64.exe
+- build\VStudio\build\%CONFIGURATION%\winfsp-tests-x86.exe
diff --git a/tst/winfsp-tests/lock-test.c b/tst/winfsp-tests/lock-test.c
index 1ab97300..ce8a5b1b 100644
--- a/tst/winfsp-tests/lock-test.c
+++ b/tst/winfsp-tests/lock-test.c
@@ -276,14 +276,20 @@ static void lock_overlapped_dotest(ULONG Flags, PWSTR VolPrefix, PWSTR Prefix, U
     Success = LockFileEx(Handle, LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY, 0,
         BytesPerSector, 0, &Overlapped);
     ASSERT(Success || ERROR_IO_PENDING == GetLastError() || ERROR_LOCK_VIOLATION == GetLastError());
-    Success = GetOverlappedResult(Handle, &Overlapped, &BytesTransferred, TRUE);
-    ASSERT(!Success && ERROR_LOCK_VIOLATION == GetLastError());
+    if (ERROR_LOCK_VIOLATION != GetLastError())
+    {
+        Success = GetOverlappedResult(Handle, &Overlapped, &BytesTransferred, TRUE);
+        ASSERT(!Success && ERROR_LOCK_VIOLATION == GetLastError());
+    }
 
     Overlapped.Offset = 0;
     Success = WriteFile(Handle, Buffer[0], BytesPerSector, &BytesTransferred, &Overlapped);
     ASSERT(Success || ERROR_IO_PENDING == GetLastError() || ERROR_LOCK_VIOLATION == GetLastError());
-    Success = GetOverlappedResult(Handle, &Overlapped, &BytesTransferred, TRUE);
-    ASSERT(!Success && ERROR_LOCK_VIOLATION == GetLastError());
+    if (ERROR_LOCK_VIOLATION != GetLastError())
+    {
+        Success = GetOverlappedResult(Handle, &Overlapped, &BytesTransferred, TRUE);
+        ASSERT(!Success && ERROR_LOCK_VIOLATION == GetLastError());
+    }
 
     Overlapped.Offset = BytesPerSector / 2;
     Success = UnlockFileEx(Handle, 0, BytesPerSector, 0, &Overlapped);