diff --git a/authfs/tests/java/src/com/android/fs/AuthFsHostTest.java b/authfs/tests/java/src/com/android/fs/AuthFsHostTest.java
index 0e660f1..67275c1 100644
--- a/authfs/tests/java/src/com/android/fs/AuthFsHostTest.java
+++ b/authfs/tests/java/src/com/android/fs/AuthFsHostTest.java
@@ -173,6 +173,7 @@
     @Before
     public void setUp() throws Exception {
         assumeFalse(sAssumptionFailed);
+        assumeFalse(isCuttlefish());
         sAndroid.run("mkdir " + TEST_OUTPUT_DIR);
     }
 
diff --git a/tests/hostside/helper/java/android/virt/test/VirtualizationTestCaseBase.java b/tests/hostside/helper/java/android/virt/test/VirtualizationTestCaseBase.java
index 440ae18..dae4231 100644
--- a/tests/hostside/helper/java/android/virt/test/VirtualizationTestCaseBase.java
+++ b/tests/hostside/helper/java/android/virt/test/VirtualizationTestCaseBase.java
@@ -399,4 +399,13 @@
         // Check if it actually booted by reading a sysprop.
         assertThat(runOnMicrodroid("getprop", "ro.hardware"), is("microdroid"));
     }
+
+    protected boolean isCuttlefish() throws Exception {
+        String productName = getDevice().getProperty("ro.product.name");
+        return (null != productName)
+                && (productName.startsWith("aosp_cf_x86")
+                        || productName.startsWith("aosp_cf_arm")
+                        || productName.startsWith("cf_x86")
+                        || productName.startsWith("cf_arm"));
+    }
 }
diff --git a/tests/hostside/java/android/virt/test/MicrodroidTestCase.java b/tests/hostside/java/android/virt/test/MicrodroidTestCase.java
index 140f1c9..3b872a3 100644
--- a/tests/hostside/java/android/virt/test/MicrodroidTestCase.java
+++ b/tests/hostside/java/android/virt/test/MicrodroidTestCase.java
@@ -77,16 +77,6 @@
     @Rule public TestLogData mTestLogs = new TestLogData();
     @Rule public TestName mTestName = new TestName();
 
-    // TODO(b/176805428): remove this
-    private boolean isCuttlefish() throws Exception {
-        String productName = getDevice().getProperty("ro.product.name");
-        return (null != productName)
-                && (productName.startsWith("aosp_cf_x86")
-                        || productName.startsWith("aosp_cf_arm")
-                        || productName.startsWith("cf_x86")
-                        || productName.startsWith("cf_arm"));
-    }
-
     private int minMemorySize() throws DeviceNotAvailableException {
         CommandRunner android = new CommandRunner(getDevice());
         String abi = android.run("getprop", "ro.product.cpu.abi");
diff --git a/tests/testapk/src/java/com/android/microdroid/test/MicrodroidTests.java b/tests/testapk/src/java/com/android/microdroid/test/MicrodroidTests.java
index f7261d3..df26ebe 100644
--- a/tests/testapk/src/java/com/android/microdroid/test/MicrodroidTests.java
+++ b/tests/testapk/src/java/com/android/microdroid/test/MicrodroidTests.java
@@ -71,6 +71,7 @@
     @Rule public Timeout globalTimeout = Timeout.seconds(300);
 
     private static final String KERNEL_VERSION = SystemProperties.get("ro.kernel.version");
+    private static final String PRODUCT_NAME = SystemProperties.get("ro.product.name");
 
     private static class Inner {
         public boolean mProtectedVm;
@@ -143,6 +144,14 @@
         mInner.mVm.delete();
     }
 
+    private boolean isCuttlefish() {
+        return (null != PRODUCT_NAME)
+               && (PRODUCT_NAME.startsWith("aosp_cf_x86")
+                       || PRODUCT_NAME.startsWith("aosp_cf_arm")
+                       || PRODUCT_NAME.startsWith("cf_x86")
+                       || PRODUCT_NAME.startsWith("cf_arm"));
+    }
+
     private abstract static class VmEventListener implements VirtualMachineCallback {
         private ExecutorService mExecutorService = Executors.newSingleThreadExecutor();
 
@@ -361,6 +370,7 @@
             .withMessage("SKip on 5.4 kernel. b/218303240")
             .that(KERNEL_VERSION)
             .isNotEqualTo("5.4");
+        assume().withMessage("Skip on CF. Too Slow. b/257270529").that(isCuttlefish()).isFalse();
 
         VmCdis first_boot_cdis = launchVmAndGetCdis("test_vm");
         VmCdis second_boot_cdis = launchVmAndGetCdis("test_vm");
@@ -509,6 +519,8 @@
     @Test
     public void bootFailsWhenMicrodroidDataIsCompromised()
             throws VirtualMachineException, InterruptedException, IOException {
+        assume().withMessage("Skip on CF. Too Slow. b/257270529").that(isCuttlefish()).isFalse();
+
         assertThatBootFailsAfterCompromisingPartition(MICRODROID_PARTITION_UUID);
     }