diff --git a/dlls/advpack/tests/install.c b/dlls/advpack/tests/install.c
index 3b0954fcf23..91bef81a9f8 100644
--- a/dlls/advpack/tests/install.c
+++ b/dlls/advpack/tests/install.c
@@ -109,9 +109,7 @@ static void test_RunSetupCommand(void)
     /* try to run an exe with the RSC_FLAG_INF flag */
     hexe = (HANDLE)0xdeadbeef;
     hr = pRunSetupCommand(NULL, "winver.exe", "Install", systemdir, "Title", &hexe, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
-    ok(is_spapi_err(hr) ||
-       hr == E_FAIL, /* win9x */
-       "Expected a setupapi error or E_FAIL, got %d\n", hr);
+    ok(is_spapi_err(hr), "Expected a setupapi error, got %d\n", hr);
     ok(hexe == (HANDLE)0xdeadbeef, "Expected hexe to be 0xdeadbeef\n");
     ok(!TerminateProcess(hexe, 0), "Expected TerminateProcess to fail\n");
 
@@ -144,9 +142,7 @@ static void test_RunSetupCommand(void)
 
     /* try a relative path to the INF, with working dir provided */
     hr = pRunSetupCommand(NULL, "one\\test.inf", "DefaultInstall", dir, "Title", NULL, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
-    ok(hr == ERROR_SUCCESS ||
-       hr == E_FAIL, /* win9x */
-       "Expected ERROR_SUCCESS, got %d\n", hr);
+    ok(hr == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", hr);
 
     /* try a relative path to the INF, NULL working dir */
     hr = pRunSetupCommand(NULL, "one\\test.inf", "DefaultInstall", NULL, "Title", NULL, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
@@ -155,15 +151,11 @@ static void test_RunSetupCommand(void)
 
     /* try a relative path to the INF, empty working dir */
     hr = pRunSetupCommand(NULL, "one\\test.inf", "DefaultInstall", "", "Title", NULL, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
-    ok(hr == ERROR_SUCCESS ||
-       hr == E_FAIL, /* win9x */
-       "Expected ERROR_SUCCESS or E_FAIL, got %d\n", hr);
+    ok(hr == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", hr);
 
     /* try only the INF filename, with working dir provided */
     hr = pRunSetupCommand(NULL, "test.inf", "DefaultInstall", dir, "Title", NULL, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
-    ok(hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) ||
-       hr == E_FAIL, /* win9x */
-       "Expected HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) or E_FAIL, got %d\n", hr);
+    ok(hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND), "Expected HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND), got %d\n", hr);
 
     /* try only the INF filename, NULL working dir */
     hr = pRunSetupCommand(NULL, "test.inf", "DefaultInstall", NULL, "Title", NULL, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
@@ -172,9 +164,7 @@ static void test_RunSetupCommand(void)
 
     /* try only the INF filename, empty working dir */
     hr = pRunSetupCommand(NULL, "test.inf", "DefaultInstall", "", "Title", NULL, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
-    ok(hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) ||
-       hr == E_FAIL, /* win9x */
-       "Expected HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) or E_FAIL, got %d\n", hr);
+    ok(hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND), "Expected HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND), got %d\n", hr);
 
     DeleteFileA("one\\test.inf");
     RemoveDirectoryA("one");
@@ -183,9 +173,7 @@ static void test_RunSetupCommand(void)
 
     /* try INF file in the current directory, working directory provided */
     hr = pRunSetupCommand(NULL, "test.inf", "DefaultInstall", CURR_DIR, "Title", NULL, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
-    ok(hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) ||
-       hr == E_FAIL, /* win9x */
-       "Expected HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) or E_FAIL, got %d\n", hr);
+    ok(hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND), "Expected HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND), got %d\n", hr);
 
     /* try INF file in the current directory, NULL working directory */
     hr = pRunSetupCommand(NULL, "test.inf", "DefaultInstall", NULL, "Title", NULL, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
@@ -194,9 +182,7 @@ static void test_RunSetupCommand(void)
 
     /* try INF file in the current directory, empty working directory */
     hr = pRunSetupCommand(NULL, "test.inf", "DefaultInstall", CURR_DIR, "Title", NULL, RSC_FLAG_INF | RSC_FLAG_QUIET, NULL);
-    ok(hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) ||
-       hr == E_FAIL, /* win9x */
-       "Expected HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) or E_FAIL, got %d\n", hr);
+    ok(hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND), "Expected HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND), got %d\n", hr);
 }
 
 static void test_LaunchINFSection(void)