diff --git a/tests/component/update_verifier_test.cpp b/tests/component/update_verifier_test.cpp
index 0a59403..e27e58c 100644
--- a/tests/component/update_verifier_test.cpp
+++ b/tests/component/update_verifier_test.cpp
@@ -98,7 +98,7 @@
   ASSERT_FALSE(verifier_.ParseCareMap());
 }
 
-TEST_F(UpdateVerifierTest, verify_image_smoke) {
+TEST_F(UpdateVerifierTest, verify_image_text_format) {
   // This test relies on dm-verity support.
   if (!verity_supported) {
     GTEST_LOG_(INFO) << "Test skipped on devices without dm-verity support.";
@@ -107,52 +107,14 @@
 
   std::string content = "system\n2,0,1";
   ASSERT_TRUE(android::base::WriteStringToFile(content, care_map_txt_));
-  ASSERT_TRUE(verifier_.ParseCareMap());
-  ASSERT_TRUE(verifier_.VerifyPartitions());
-
-  // Leading and trailing newlines should be accepted.
-  ASSERT_TRUE(android::base::WriteStringToFile("\n" + content + "\n\n", care_map_txt_));
-  ASSERT_TRUE(verifier_.ParseCareMap());
-  ASSERT_TRUE(verifier_.VerifyPartitions());
+  // CareMap in text format is no longer supported.
+  ASSERT_FALSE(verifier_.ParseCareMap());
 }
 
 TEST_F(UpdateVerifierTest, verify_image_empty_care_map) {
   ASSERT_FALSE(verifier_.ParseCareMap());
 }
 
-TEST_F(UpdateVerifierTest, verify_image_wrong_lines) {
-  // The care map file can have only 2 / 4 / 6 lines.
-  ASSERT_TRUE(android::base::WriteStringToFile("line1", care_map_txt_));
-  ASSERT_FALSE(verifier_.ParseCareMap());
-
-  ASSERT_TRUE(android::base::WriteStringToFile("line1\nline2\nline3", care_map_txt_));
-  ASSERT_FALSE(verifier_.ParseCareMap());
-}
-
-TEST_F(UpdateVerifierTest, verify_image_malformed_care_map) {
-  // This test relies on dm-verity support.
-  if (!verity_supported) {
-    GTEST_LOG_(INFO) << "Test skipped on devices without dm-verity support.";
-    return;
-  }
-
-  std::string content = "system\n2,1,0";
-  ASSERT_TRUE(android::base::WriteStringToFile(content, care_map_txt_));
-  ASSERT_FALSE(verifier_.ParseCareMap());
-}
-
-TEST_F(UpdateVerifierTest, verify_image_legacy_care_map) {
-  // This test relies on dm-verity support.
-  if (!verity_supported) {
-    GTEST_LOG_(INFO) << "Test skipped on devices without dm-verity support.";
-    return;
-  }
-
-  std::string content = "/dev/block/bootdevice/by-name/system\n2,1,0";
-  ASSERT_TRUE(android::base::WriteStringToFile(content, care_map_txt_));
-  ASSERT_FALSE(verifier_.ParseCareMap());
-}
-
 TEST_F(UpdateVerifierTest, verify_image_protobuf_care_map_smoke) {
   // This test relies on dm-verity support.
   if (!verity_supported) {
diff --git a/update_verifier/include/update_verifier/update_verifier.h b/update_verifier/include/update_verifier/update_verifier.h
index b00890e..4c64b1e 100644
--- a/update_verifier/include/update_verifier/update_verifier.h
+++ b/update_verifier/include/update_verifier/update_verifier.h
@@ -50,9 +50,6 @@
 
  private:
   friend class UpdateVerifierTest;
-  // Parses the legacy care_map.txt in plain text format.
-  bool ParseCareMapPlainText(const std::string& content);
-
   // Finds all the dm-enabled partitions, and returns a map of <partition_name, block_device>.
   std::map<std::string, std::string> FindDmPartitions();
 
diff --git a/update_verifier/update_verifier.cpp b/update_verifier/update_verifier.cpp
index 5e5eac7..28c3fe7 100644
--- a/update_verifier/update_verifier.cpp
+++ b/update_verifier/update_verifier.cpp
@@ -68,6 +68,7 @@
 using android::hardware::boot::V1_0::BoolResult;
 using android::hardware::boot::V1_0::CommandResult;
 
+// TODO(xunchang) remove the prefix and use a default path instead.
 constexpr const char* kDefaultCareMapPrefix = "/data/ota_package/care_map";
 
 // Find directories in format of "/sys/block/dm-X".
@@ -196,51 +197,13 @@
   return true;
 }
 
-bool UpdateVerifier::ParseCareMapPlainText(const std::string& content) {
-  // care_map file has up to six lines, where every two lines make a pair. Within each pair, the
-  // first line has the partition name (e.g. "system"), while the second line holds the ranges of
-  // all the blocks to verify.
-  auto lines = android::base::Split(android::base::Trim(content), "\n");
-  if (lines.size() != 2 && lines.size() != 4 && lines.size() != 6) {
-    LOG(WARNING) << "Invalid lines in care_map: found " << lines.size()
-                 << " lines, expecting 2 or 4 or 6 lines.";
-    return false;
-  }
-
-  for (size_t i = 0; i < lines.size(); i += 2) {
-    const std::string& partition_name = lines[i];
-    const std::string& range_str = lines[i + 1];
-    // We're seeing an N care_map.txt. Skip the verification since it's not compatible with O
-    // update_verifier (the last few metadata blocks can't be read via device mapper).
-    if (android::base::StartsWith(partition_name, "/dev/block/")) {
-      LOG(WARNING) << "Found legacy care_map.txt; skipped.";
-      return false;
-    }
-
-    // For block range string, first integer 'count' equals 2 * total number of valid ranges,
-    // followed by 'count' number comma separated integers. Every two integers reprensent a
-    // block range with the first number included in range but second number not included.
-    // For example '4,64536,65343,74149,74150' represents: [64536,65343) and [74149,74150).
-    RangeSet ranges = RangeSet::Parse(range_str);
-    if (!ranges) {
-      LOG(WARNING) << "Error parsing RangeSet string " << range_str;
-      return false;
-    }
-
-    partition_map_.emplace(partition_name, ranges);
-  }
-
-  return true;
-}
-
 bool UpdateVerifier::ParseCareMap() {
   partition_map_.clear();
 
   std::string care_map_name = care_map_prefix_ + ".pb";
   if (access(care_map_name.c_str(), R_OK) == -1) {
-    LOG(WARNING) << care_map_name
-                 << " doesn't exist, falling back to read the care_map in plain text format.";
-    care_map_name = care_map_prefix_ + ".txt";
+    LOG(ERROR) << care_map_name << " doesn't exist";
+    return false;
   }
 
   android::base::unique_fd care_map_fd(TEMP_FAILURE_RETRY(open(care_map_name.c_str(), O_RDONLY)));
@@ -263,10 +226,6 @@
     return false;
   }
 
-  if (android::base::EndsWith(care_map_name, ".txt")) {
-    return ParseCareMapPlainText(file_content);
-  }
-
   recovery_update_verifier::CareMap care_map;
   if (!care_map.ParseFromString(file_content)) {
     LOG(WARNING) << "Failed to parse " << care_map_name << " in protobuf format.";