diff --git a/unified-runtime/scripts/core/INTRO.rst b/unified-runtime/scripts/core/INTRO.rst
index cf58279855aaf..fb4367f4e666a 100644
--- a/unified-runtime/scripts/core/INTRO.rst
+++ b/unified-runtime/scripts/core/INTRO.rst
@@ -426,10 +426,10 @@ no valid platforms, then the tests will fail. Command line arguments take priori
 
 .. envvar:: UR_CTS_ALSO_RUN_KNOWN_FAILURES
 
-   A boolean option to enable running tests which have been marked as known
-   failures using the :c:macro:`UUR_KNOWN_FAILURE_ON` macro. Enabled when the
-   environment variable is set to any of the following values: ``1``, ``on``,
-   ``ON``, ``yes``, ``YES``, ``true``, ``TRUE``.
+   A boolean option to enable running tests which have been either marked as known
+   failures using the :c:macro:`UUR_KNOWN_FAILURE_ON` macro or would run on a
+   blacklisted platform. Enabled when the environment variable is set to any of
+   the following values: ``1``, ``on``, ``ON``, ``yes``, ``YES``, ``true``, ``TRUE``.
 
 Service identifiers
 ---------------------
diff --git a/unified-runtime/test/conformance/testing/include/uur/fixtures.h b/unified-runtime/test/conformance/testing/include/uur/fixtures.h
index 1ace68a1be727..eb52fcab5954f 100644
--- a/unified-runtime/test/conformance/testing/include/uur/fixtures.h
+++ b/unified-runtime/test/conformance/testing/include/uur/fixtures.h
@@ -18,6 +18,40 @@
 
 namespace uur {
 
+namespace {
+// By default we skip certain platforms that we don't officially support and are unstable
+void checkBlacklisted(ur_platform_handle_t platform) {
+  static const std::array<uur::Matcher, 1> BLACKLISTED_PLATFORMS{
+      uur::OpenCL{"AMD Accelerated Parallel Processing"},
+  };
+
+  if (uur::alsoRunKnownFailures()) {
+    return;
+  }
+
+  ur_adapter_handle_t adapter = 0;
+  ASSERT_SUCCESS(urPlatformGetInfo(platform, UR_PLATFORM_INFO_ADAPTER,
+                                   sizeof(adapter), &adapter, nullptr));
+  detail::AdapterInfo info = detail::getAdapterInfo(adapter);
+
+  size_t name_size = 0;
+  ASSERT_SUCCESS(urPlatformGetInfo(platform, UR_PLATFORM_INFO_NAME, 0, nullptr,
+                                   &name_size));
+  std::string name(name_size - 1, '\0');
+  ASSERT_SUCCESS(urPlatformGetInfo(platform, UR_PLATFORM_INFO_NAME, name_size,
+                                   name.data(), nullptr));
+
+  for (auto &m : BLACKLISTED_PLATFORMS) {
+    if (m.matches(info, name)) {
+      GTEST_SKIP() << "Platform '" << name
+                   << "' is blacklisted and not tested by default."
+                      " Set `UR_CTS_ALSO_RUN_KNOWN_FAILURES` in the "
+                      "environment to disable the blacklist.";
+    }
+  }
+}
+} // namespace
+
 struct urAdapterTest : ::testing::Test,
                        ::testing::WithParamInterface<ur_adapter_handle_t> {
   void SetUp() override { adapter = GetParam(); }
@@ -31,7 +65,10 @@ struct urAdapterTest : ::testing::Test,
 // platform.
 struct urPlatformTest : ::testing::Test,
                         ::testing::WithParamInterface<ur_platform_handle_t> {
-  void SetUp() override { platform = GetParam(); }
+  void SetUp() override {
+    platform = GetParam();
+    UUR_RETURN_ON_FATAL_FAILURE(checkBlacklisted(platform));
+  }
 
   ur_platform_handle_t platform = nullptr;
 };
@@ -84,6 +121,8 @@ struct urDeviceTest : ::testing::Test,
     device = GetParam().device;
     platform = GetParam().platform;
     adapter = GetParam().adapter;
+
+    UUR_RETURN_ON_FATAL_FAILURE(checkBlacklisted(platform));
   }
 
   ur_device_handle_t device = nullptr;
@@ -122,7 +161,10 @@ template <class T>
 struct urPlatformTestWithParam
     : ::testing::Test,
       ::testing::WithParamInterface<std::tuple<ur_platform_handle_t, T>> {
-  void SetUp() override { platform = std::get<0>(this->GetParam()); }
+  void SetUp() override {
+    platform = std::get<0>(this->GetParam());
+    UUR_RETURN_ON_FATAL_FAILURE(checkBlacklisted(platform));
+  }
   const T &getParam() const { return std::get<1>(this->GetParam()); }
   ur_platform_handle_t platform;
 };
@@ -154,6 +196,8 @@ struct urDeviceTestWithParam
     device = device_tuple.device;
     platform = device_tuple.platform;
     adapter = device_tuple.adapter;
+
+    UUR_RETURN_ON_FATAL_FAILURE(checkBlacklisted(platform));
   }
   // TODO - I don't like the confusion with GetParam();
   const T &getParam() const { return std::get<1>(this->GetParam()); }
diff --git a/unified-runtime/test/conformance/testing/include/uur/known_failure.h b/unified-runtime/test/conformance/testing/include/uur/known_failure.h
index 615aa128006d0..1276ccb5684c5 100644
--- a/unified-runtime/test/conformance/testing/include/uur/known_failure.h
+++ b/unified-runtime/test/conformance/testing/include/uur/known_failure.h
@@ -32,9 +32,9 @@ inline AdapterInfo getAdapterInfo(ur_adapter_handle_t adapter) {
 
 struct Matcher {
   Matcher(uint32_t adapterVersion, ur_backend_t backend,
-          std::vector<std::string> deviceNames)
+          std::vector<std::string> checkNames)
       : adapterVersion(adapterVersion), backend(backend),
-        names(std::move(deviceNames)) {}
+        names(std::move(checkNames)) {}
 
   bool matches(const detail::AdapterInfo &adapterInfo,
                const std::string &name) const {