diff --git a/dlls/atl100/tests/atl.c b/dlls/atl100/tests/atl.c
index f6cc85bbfa..d07a523077 100644
--- a/dlls/atl100/tests/atl.c
+++ b/dlls/atl100/tests/atl.c
@@ -916,6 +916,8 @@ static void test_AtlAxCreateControl(void)
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(container != NULL, "returned %p!\n", container);
     ok(control != NULL, "returned %p\n", control);
+    IUnknown_Release(container);
+    IUnknown_Release(control);
     DestroyWindow(hwnd);
 
     container = NULL;
@@ -926,6 +928,8 @@ static void test_AtlAxCreateControl(void)
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(container != NULL, "returned %p!\n", container);
     ok(control != NULL, "returned %p\n", control);
+    IUnknown_Release(container);
+    IUnknown_Release(control);
     DestroyWindow(hwnd);
 
     container = NULL;
@@ -936,6 +940,8 @@ static void test_AtlAxCreateControl(void)
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(container != NULL, "returned %p!\n", container);
     ok(control != NULL, "returned %p\n", control);
+    IUnknown_Release(container);
+    IUnknown_Release(control);
     DestroyWindow(hwnd);
 
     container = NULL;
@@ -946,6 +952,8 @@ static void test_AtlAxCreateControl(void)
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(container != NULL, "returned %p!\n", container);
     ok(control != NULL, "returned %p\n", control);
+    IUnknown_Release(container);
+    IUnknown_Release(control);
     DestroyWindow(hwnd);
 
     container = (IUnknown *)0xdeadbeef;
@@ -976,6 +984,8 @@ static void test_AtlAxCreateControl(void)
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(container != NULL, "returned %p!\n", container);
     ok(control != NULL, "returned %p\n", control);
+    IUnknown_Release(container);
+    IUnknown_Release(control);
     DestroyWindow(hwnd);
 
     /* test file:// scheme */
@@ -989,6 +999,8 @@ static void test_AtlAxCreateControl(void)
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(container != NULL, "returned %p!\n", container);
     ok(control != NULL, "returned %p\n", control);
+    IUnknown_Release(container);
+    IUnknown_Release(control);
     DestroyWindow(hwnd);
 
     /* test file:// scheme on non-existent file. */
@@ -1002,6 +1014,8 @@ static void test_AtlAxCreateControl(void)
     ok(hr == S_OK, "got 0x%08x\n", hr);
     ok(container != NULL, "returned %p!\n", container);
     ok(control != NULL, "returned %p\n", control);
+    IUnknown_Release(container);
+    IUnknown_Release(control);
     DestroyWindow(hwnd);
 }