diff --git a/dlls/kernel32/tests/mailslot.c b/dlls/kernel32/tests/mailslot.c
index 4171504960b..da595e97143 100644
--- a/dlls/kernel32/tests/mailslot.c
+++ b/dlls/kernel32/tests/mailslot.c
@@ -42,24 +42,24 @@ static int mailslot_test(void)
             &dwMsgCount, &dwTimeout ), "getmailslotinfo succeeded\n");
 
     /* open a mailslot that doesn't exist */
-    hWriter = CreateFile(szmspath, GENERIC_READ|GENERIC_WRITE,
+    hWriter = CreateFileA(szmspath, GENERIC_READ|GENERIC_WRITE,
                              FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
     ok( hWriter == INVALID_HANDLE_VALUE, "nonexistent mailslot\n");
 
     /* open a mailslot without the right name */
-    hSlot = CreateMailslot( "blah", 0, 0, NULL );
+    hSlot = CreateMailslotA( "blah", 0, 0, NULL );
     ok( hSlot == INVALID_HANDLE_VALUE,
             "Created mailslot with invalid name\n");
     ok( GetLastError() == ERROR_INVALID_NAME,
             "error should be ERROR_INVALID_NAME\n");
 
     /* open a mailslot with a null name */
-    hSlot = CreateMailslot( NULL, 0, 0, NULL );
+    hSlot = CreateMailslotA( NULL, 0, 0, NULL );
     ok( hSlot == INVALID_HANDLE_VALUE, "Created mailslot with invalid name\n");
     ok( GetLastError() == ERROR_PATH_NOT_FOUND, "error should be ERROR_PATH_NOT_FOUND\n");
 
     /* valid open, but with wacky parameters ... then check them */
-    hSlot = CreateMailslot( szmspath, -1, -1, NULL );
+    hSlot = CreateMailslotA( szmspath, -1, -1, NULL );
     ok( hSlot != INVALID_HANDLE_VALUE , "mailslot with valid name failed\n");
     dwMax = dwNext = dwMsgCount = dwTimeout = 0;
     ok( GetMailslotInfo( hSlot, &dwMax, &dwNext, &dwMsgCount, &dwTimeout ),
@@ -73,7 +73,7 @@ static int mailslot_test(void)
     ok( CloseHandle(hSlot), "failed to close mailslot\n");
 
     /* now open it for real */
-    hSlot = CreateMailslot( szmspath, 0, 0, NULL );
+    hSlot = CreateMailslotA( szmspath, 0, 0, NULL );
     ok( hSlot != INVALID_HANDLE_VALUE , "valid mailslot failed\n");
 
     /* try and read/write to it */
@@ -103,14 +103,14 @@ todo_wine
     ok( GetLastError() == ERROR_ACCESS_DENIED, "wrong error %u\n", GetLastError() );
 
     /* now try and open the client, but with the wrong sharing mode */
-    hWriter = CreateFile(szmspath, GENERIC_WRITE,
+    hWriter = CreateFileA(szmspath, GENERIC_WRITE,
                              0, NULL, OPEN_EXISTING, 0, NULL);
     ok( hWriter != INVALID_HANDLE_VALUE /* vista */ || GetLastError() == ERROR_SHARING_VIOLATION,
         "error should be ERROR_SHARING_VIOLATION got %p / %u\n", hWriter, GetLastError());
     if (hWriter != INVALID_HANDLE_VALUE) CloseHandle( hWriter );
 
     /* now open the client with the correct sharing mode */
-    hWriter = CreateFile(szmspath, GENERIC_READ|GENERIC_WRITE,
+    hWriter = CreateFileA(szmspath, GENERIC_READ|GENERIC_WRITE,
                              FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
     ok( hWriter != INVALID_HANDLE_VALUE, "existing mailslot err %u\n", GetLastError());
 
@@ -156,25 +156,25 @@ todo_wine
     else ok( count == 0, "wrong count %u\n", count );
 
     /* now try open another writer... should fail */
-    hWriter2 = CreateFile(szmspath, GENERIC_READ|GENERIC_WRITE,
+    hWriter2 = CreateFileA(szmspath, GENERIC_READ|GENERIC_WRITE,
                      FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
     /* succeeds on vista, don't test */
     if (hWriter2 != INVALID_HANDLE_VALUE) CloseHandle( hWriter2 );
 
     /* now try open another as a reader ... also fails */
-    hWriter2 = CreateFile(szmspath, GENERIC_READ,
+    hWriter2 = CreateFileA(szmspath, GENERIC_READ,
                      FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
     /* succeeds on vista, don't test */
     if (hWriter2 != INVALID_HANDLE_VALUE) CloseHandle( hWriter2 );
 
     /* now try open another as a writer ... still fails */
-    hWriter2 = CreateFile(szmspath, GENERIC_WRITE,
+    hWriter2 = CreateFileA(szmspath, GENERIC_WRITE,
                      FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
     /* succeeds on vista, don't test */
     if (hWriter2 != INVALID_HANDLE_VALUE) CloseHandle( hWriter2 );
 
     /* now open another one */
-    hSlot2 = CreateMailslot( szmspath, 0, 0, NULL );
+    hSlot2 = CreateMailslotA( szmspath, 0, 0, NULL );
     ok( hSlot2 == INVALID_HANDLE_VALUE , "opened two mailslots\n");
 
     /* close the client again */
@@ -184,7 +184,7 @@ todo_wine
      * now try reopen it with slightly different permissions ...
      * shared writing
      */
-    hWriter = CreateFile(szmspath, GENERIC_WRITE,
+    hWriter = CreateFileA(szmspath, GENERIC_WRITE,
               FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
     ok( hWriter != INVALID_HANDLE_VALUE, "sharing writer\n");
 
@@ -192,13 +192,13 @@ todo_wine
      * now try open another as a writer ...
      * but don't share with the first ... fail
      */
-    hWriter2 = CreateFile(szmspath, GENERIC_WRITE,
+    hWriter2 = CreateFileA(szmspath, GENERIC_WRITE,
                      FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
     /* succeeds on vista, don't test */
     if (hWriter2 != INVALID_HANDLE_VALUE) CloseHandle( hWriter2 );
 
     /* now try open another as a writer ... and share with the first */
-    hWriter2 = CreateFile(szmspath, GENERIC_WRITE,
+    hWriter2 = CreateFileA(szmspath, GENERIC_WRITE,
               FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
     ok( hWriter2 != INVALID_HANDLE_VALUE, "2nd sharing writer\n");
 
@@ -316,7 +316,7 @@ todo_wine
     ok( CloseHandle( hSlot ), "closing the mailslot\n");
 
     /* test timeouts */
-    hSlot = CreateMailslot( szmspath, 0, 1000, NULL );
+    hSlot = CreateMailslotA( szmspath, 0, 1000, NULL );
     ok( hSlot != INVALID_HANDLE_VALUE , "valid mailslot failed\n");
     count = 0;
     memset(buffer, 0, sizeof buffer);