diff --git a/dlls/msado15/msado15_private.h b/dlls/msado15/msado15_private.h
index 83c8b7c9660..f901791ea9e 100644
--- a/dlls/msado15/msado15_private.h
+++ b/dlls/msado15/msado15_private.h
@@ -19,6 +19,8 @@
 #ifndef _WINE_MSADO15_PRIVATE_H_
 #define _WINE_MSADO15_PRIVATE_H_
 
+#define MAKE_ADO_HRESULT( err ) MAKE_HRESULT( SEVERITY_ERROR, FACILITY_CONTROL, err )
+
 HRESULT Connection_create( void ** ) DECLSPEC_HIDDEN;
 HRESULT Recordset_create( void ** ) DECLSPEC_HIDDEN;
 HRESULT Stream_create( void ** ) DECLSPEC_HIDDEN;
diff --git a/dlls/msado15/stream.c b/dlls/msado15/stream.c
index 8e88b9aa651..3c9d885edf0 100644
--- a/dlls/msado15/stream.c
+++ b/dlls/msado15/stream.c
@@ -34,6 +34,7 @@ struct stream
 {
     _Stream         Stream_iface;
     LONG            refs;
+    ObjectStateEnum state;
     StreamTypeEnum  type;
 };
 
@@ -198,14 +199,25 @@ static HRESULT WINAPI stream_Read( _Stream *iface, LONG size, VARIANT *val )
 static HRESULT WINAPI stream_Open( _Stream *iface, VARIANT src, ConnectModeEnum mode, StreamOpenOptionsEnum options,
                                     BSTR username, BSTR password )
 {
-    FIXME( "%p, %s, %u, %d, %s, %p\n", iface, debugstr_variant(&src), mode, options, debugstr_w(username), password );
-    return E_NOTIMPL;
+    struct stream *stream = impl_from_Stream( iface );
+    FIXME( "%p, %s, %u, %d, %s, %p\n", stream, debugstr_variant(&src), mode, options, debugstr_w(username), password );
+
+    if (stream->state == adStateOpen) return MAKE_ADO_HRESULT( adErrObjectOpen );
+
+    stream->state = adStateOpen;
+    return S_OK;
 }
 
 static HRESULT WINAPI stream_Close( _Stream *iface )
 {
-    FIXME( "%p\n", iface );
-    return E_NOTIMPL;
+    struct stream *stream = impl_from_Stream( iface );
+
+    TRACE( "%p\n", stream );
+
+    if (stream->state == adStateClosed) return MAKE_ADO_HRESULT( adErrObjectClosed );
+
+    stream->state = adStateClosed;
+    return S_OK;
 }
 
 static HRESULT WINAPI stream_SkipLine( _Stream *iface )
diff --git a/dlls/msado15/tests/msado15.c b/dlls/msado15/tests/msado15.c
index ed465e20723..e562c2299f2 100644
--- a/dlls/msado15/tests/msado15.c
+++ b/dlls/msado15/tests/msado15.c
@@ -23,11 +23,14 @@
 #include <msado15_backcompat.h>
 #include "wine/test.h"
 
+#define MAKE_ADO_HRESULT( err ) MAKE_HRESULT( SEVERITY_ERROR, FACILITY_CONTROL, err )
+
 static void test_Stream(void)
 {
     _Stream *stream;
     StreamTypeEnum type;
     LONG refs;
+    VARIANT missing;
     HRESULT hr;
 
     hr = CoCreateInstance( &CLSID_Stream, NULL, CLSCTX_INPROC_SERVER, &IID__Stream, (void **)&stream );
@@ -51,6 +54,20 @@ static void test_Stream(void)
     hr = _Stream_put_Type( stream, adTypeText );
     ok( hr == S_OK, "got %08x\n", hr );
 
+    V_VT( &missing ) = VT_ERROR;
+    V_ERROR( &missing ) = DISP_E_PARAMNOTFOUND;
+    hr = _Stream_Open( stream, missing, adModeUnknown, adOpenStreamUnspecified, NULL, NULL );
+    ok( hr == S_OK, "got %08x\n", hr );
+
+    hr = _Stream_Open( stream, missing, adModeUnknown, adOpenStreamUnspecified, NULL, NULL );
+    ok( hr == MAKE_ADO_HRESULT( adErrObjectOpen ), "got %08x\n", hr );
+
+    hr = _Stream_Close( stream );
+    ok( hr == S_OK, "got %08x\n", hr );
+
+    hr = _Stream_Close( stream );
+    ok( hr == MAKE_ADO_HRESULT( adErrObjectClosed ), "got %08x\n", hr );
+
     refs = _Stream_Release( stream );
     ok( !refs, "got %d\n", refs );
 }