diff --git a/src/com/android/dialer/filterednumber/FilteredNumbersUtil.java b/src/com/android/dialer/filterednumber/FilteredNumbersUtil.java
index 4cc8e75..76d3913 100644
--- a/src/com/android/dialer/filterednumber/FilteredNumbersUtil.java
+++ b/src/com/android/dialer/filterednumber/FilteredNumbersUtil.java
@@ -35,6 +35,7 @@
 
 import java.util.LinkedList;
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 
 import com.android.contacts.common.testing.NeededForTesting;
 import com.android.dialer.R;
@@ -247,21 +248,21 @@
                 FilteredNumberColumns.NORMALIZED_NUMBER + "=?",
                 new String[] { normalizedNumber },
                 null);
-
-        boolean shouldBlock = false;
-        if (cursor != null) {
-            try {
-                if (cursor.moveToFirst()) {
-                    // Block if number is found and it was added before this voicemail was received.
-                    final long numberBlockedTimeMs = cursor.getLong(0);
-                    shouldBlock = cursor.getCount() > 0 && voicemailDateMs > numberBlockedTimeMs;
-                }
-            } finally {
-                cursor.close();
-            }
+        if (cursor == null) {
+            return false;
         }
-
-        return shouldBlock;
+        try {
+                /*
+                 * Block if number is found and it was added before this voicemail was received.
+                 * The VVM's date is reported with precision to the minute, even though its
+                 * magnitude is in milliseconds, so we perform the comparison in minutes.
+                 */
+                return cursor.moveToFirst() &&
+                        TimeUnit.MINUTES.convert(voicemailDateMs, TimeUnit.MILLISECONDS) >=
+                                TimeUnit.MINUTES.convert(cursor.getLong(0), TimeUnit.MILLISECONDS);
+        } finally {
+            cursor.close();
+        }
     }
 
     public static boolean hasRecentEmergencyCall(Context context) {
diff --git a/tests/src/com/android/dialer/filterednumber/FilteredNumbersUtilTest.java b/tests/src/com/android/dialer/filterednumber/FilteredNumbersUtilTest.java
new file mode 100644
index 0000000..180295c
--- /dev/null
+++ b/tests/src/com/android/dialer/filterednumber/FilteredNumbersUtilTest.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.dialer.filterednumber;
+
+import android.test.AndroidTestCase;
+
+import com.android.contacts.common.test.mocks.ContactsMockContext;
+import com.android.contacts.common.test.mocks.MockContentProvider.Query;
+import com.android.dialer.database.FilteredNumberContract;
+import com.android.dialer.database.FilteredNumberContract.FilteredNumber;
+import com.android.dialer.database.FilteredNumberContract.FilteredNumberColumns;
+
+public class FilteredNumbersUtilTest extends AndroidTestCase {
+
+    private static final String COUNTRY_ISO = "US";
+
+    // Wed Nov 11 2015 15:00:00
+    private static final long EARLIER_TIME = 1447282800000l;
+
+    // Wed Nov 11 2015 15:01:40
+    private static final long LATER_TIME = 1447282900000l;
+
+    private static final String[] FILTERED_NUMBER_PROJECTION = new String[] {
+            FilteredNumberColumns.CREATION_TIME };
+
+    private static final String NORMALIZED_NUMBER = "+16503903411";
+
+    private static final long NULL_CREATION_TIME = -1;
+
+    private ContactsMockContext mContext;
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        mContext = new ContactsMockContext(getContext(), FilteredNumberContract.AUTHORITY);
+    }
+
+    public void testShouldBlockVoicemail_NotBlocked() {
+        setupShouldBlockVoicemailQuery(NULL_CREATION_TIME);
+        assertFalse(FilteredNumbersUtil.shouldBlockVoicemail(mContext, NORMALIZED_NUMBER,
+                COUNTRY_ISO, EARLIER_TIME));
+    }
+
+    public void testShouldBlockVoicemail_BlockedBeforeVoicemail() {
+        setupShouldBlockVoicemailQuery(EARLIER_TIME);
+        assertTrue(FilteredNumbersUtil.shouldBlockVoicemail(mContext, NORMALIZED_NUMBER,
+                COUNTRY_ISO, LATER_TIME));
+    }
+
+    public void testShouldBlockVoicemail_BlockedAfterVoicemail() {
+        setupShouldBlockVoicemailQuery(LATER_TIME);
+        assertFalse(FilteredNumbersUtil.shouldBlockVoicemail(mContext, NORMALIZED_NUMBER,
+                COUNTRY_ISO, EARLIER_TIME));
+    }
+
+    public void testShouldBlockVoicemail_BlockedSameTimeAsVoicemail() {
+        setupShouldBlockVoicemailQuery(EARLIER_TIME);
+        assertTrue(FilteredNumbersUtil.shouldBlockVoicemail(mContext, NORMALIZED_NUMBER,
+                COUNTRY_ISO, EARLIER_TIME));
+    }
+
+    public void testShouldBlockVoicemail_BlockedInSameMinuteAsVoicemail() {
+        setupShouldBlockVoicemailQuery(EARLIER_TIME);
+        assertTrue(FilteredNumbersUtil.shouldBlockVoicemail(mContext, NORMALIZED_NUMBER,
+                COUNTRY_ISO, EARLIER_TIME + 30000));
+    }
+
+    private void setupShouldBlockVoicemailQuery(long creationTimeMs) {
+        Query query = mContext.getContactsProvider().expectQuery(FilteredNumber.CONTENT_URI)
+                .withProjection(FILTERED_NUMBER_PROJECTION)
+                .withAnySelection()
+                .withAnySortOrder();
+        if (creationTimeMs == NULL_CREATION_TIME) {
+            query.returnEmptyCursor();
+            return;
+        }
+        query.returnRow(creationTimeMs);
+    }
+}