diff --git a/applypatch/imgdiff.cpp b/applypatch/imgdiff.cpp
index 91007ac..8586028 100644
--- a/applypatch/imgdiff.cpp
+++ b/applypatch/imgdiff.cpp
@@ -1038,20 +1038,21 @@
   split_tgt_image.Initialize(aligned_tgt_chunks, {});
   split_tgt_image.MergeAdjacentNormalChunks();
 
-  // Construct the dummy source file based on the src_ranges.
-  std::vector<uint8_t> src_content;
+  // Construct the split source file based on the split src ranges.
+  std::vector<uint8_t> split_src_content;
   for (const auto& r : split_src_ranges) {
     size_t end = std::min(src_image.file_content_.size(), r.second * BLOCK_SIZE);
-    src_content.insert(src_content.end(), src_image.file_content_.begin() + r.first * BLOCK_SIZE,
-                       src_image.file_content_.begin() + end);
+    split_src_content.insert(split_src_content.end(),
+                             src_image.file_content_.begin() + r.first * BLOCK_SIZE,
+                             src_image.file_content_.begin() + end);
   }
 
   // We should not have an empty src in our design; otherwise we will encounter an error in
-  // bsdiff since src_content.data() == nullptr.
-  CHECK(!src_content.empty());
+  // bsdiff since split_src_content.data() == nullptr.
+  CHECK(!split_src_content.empty());
 
   ZipModeImage split_src_image(true);
-  split_src_image.Initialize(split_src_chunks, src_content);
+  split_src_image.Initialize(split_src_chunks, split_src_content);
 
   split_tgt_images->push_back(std::move(split_tgt_image));
   split_src_images->push_back(std::move(split_src_image));
diff --git a/applypatch/include/applypatch/imgdiff_image.h b/applypatch/include/applypatch/imgdiff_image.h
index 6716051..aa8d129 100644
--- a/applypatch/include/applypatch/imgdiff_image.h
+++ b/applypatch/include/applypatch/imgdiff_image.h
@@ -211,7 +211,7 @@
 
   bool Initialize(const std::string& filename) override;
 
-  // Initialize a dummy ZipModeImage from an existing ImageChunk vector. For src img pieces, we
+  // Initialize a fake ZipModeImage from an existing ImageChunk vector. For src img pieces, we
   // reconstruct a new file_content based on the source ranges; but it's not needed for the tgt img
   // pieces; because for each chunk both the data and their offset within the file are unchanged.
   void Initialize(const std::vector<ImageChunk>& chunks, const std::vector<uint8_t>& file_content) {
@@ -265,7 +265,7 @@
                                   const std::vector<ZipModeImage>& split_src_images,
                                   std::vector<SortedRangeSet>& split_src_ranges,
                                   size_t total_tgt_size);
-  // Construct the dummy split images based on the chunks info and source ranges; and move them into
+  // Construct the fake split images based on the chunks info and source ranges; and move them into
   // the given vectors. Return true if we add a new split image into |split_tgt_images|, and
   // false otherwise.
   static bool AddSplitImageFromChunkList(const ZipModeImage& tgt_image,
diff --git a/otautil/include/otautil/error_code.h b/otautil/include/otautil/error_code.h
index 2b73c13..7b52ce5 100644
--- a/otautil/include/otautil/error_code.h
+++ b/otautil/include/otautil/error_code.h
@@ -22,7 +22,7 @@
   kLowBattery = 20,
   kZipVerificationFailure,
   kZipOpenFailure,
-  kBootreasonInBlacklist,
+  kBootreasonInBlocklist,
   kPackageCompatibilityFailure,
   kScriptExecutionFailure,
   kMapFileFailure,
diff --git a/recovery.cpp b/recovery.cpp
index df13835..84deeb4 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -559,15 +559,15 @@
   }
 }
 
-static bool bootreason_in_blacklist() {
+static bool bootreason_in_blocklist() {
   std::string bootreason = android::base::GetProperty("ro.boot.bootreason", "");
   if (!bootreason.empty()) {
     // More bootreasons can be found in "system/core/bootstat/bootstat.cpp".
-    static const std::vector<std::string> kBootreasonBlacklist{
+    static const std::vector<std::string> kBootreasonBlocklist{
       "kernel_panic",
       "Panic",
     };
-    for (const auto& str : kBootreasonBlacklist) {
+    for (const auto& str : kBootreasonBlocklist) {
       if (android::base::EqualsIgnoreCase(str, bootreason)) return true;
     }
   }
@@ -734,10 +734,10 @@
       // Log the error code to last_install when installation skips due to low battery.
       log_failure_code(kLowBattery, update_package);
       status = INSTALL_SKIPPED;
-    } else if (retry_count == 0 && bootreason_in_blacklist()) {
+    } else if (retry_count == 0 && bootreason_in_blocklist()) {
       // Skip update-on-reboot when bootreason is kernel_panic or similar
-      ui->Print("bootreason is in the blacklist; skip OTA installation\n");
-      log_failure_code(kBootreasonInBlacklist, update_package);
+      ui->Print("bootreason is in the blocklist; skip OTA installation\n");
+      log_failure_code(kBootreasonInBlocklist, update_package);
       status = INSTALL_SKIPPED;
     } else {
       // It's a fresh update. Initialize the retry_count in the BCB to 1; therefore we can later
diff --git a/tests/testdata/ziptest_dummy-update.zip b/tests/testdata/ziptest_fake-update.zip
similarity index 100%
rename from tests/testdata/ziptest_dummy-update.zip
rename to tests/testdata/ziptest_fake-update.zip
Binary files differ
diff --git a/tests/unit/host/imgdiff_test.cpp b/tests/unit/host/imgdiff_test.cpp
index e76ccbd..978ac7c 100644
--- a/tests/unit/host/imgdiff_test.cpp
+++ b/tests/unit/host/imgdiff_test.cpp
@@ -35,7 +35,6 @@
 
 using android::base::get_unaligned;
 
-// Sanity check for the given imgdiff patch header.
 static void verify_patch_header(const std::string& patch, size_t* num_normal, size_t* num_raw,
                                 size_t* num_deflate) {
   const size_t size = patch.size();
diff --git a/tests/unit/install_test.cpp b/tests/unit/install_test.cpp
index 90c4b14..fc7c2bf 100644
--- a/tests/unit/install_test.cpp
+++ b/tests/unit/install_test.cpp
@@ -76,7 +76,7 @@
 
 TEST(InstallTest, read_metadata_from_package_no_entry) {
   TemporaryFile temp_file;
-  BuildZipArchive({ { "dummy_entry", "" } }, temp_file.release(), kCompressStored);
+  BuildZipArchive({ { "fake_entry", "" } }, temp_file.release(), kCompressStored);
 
   ZipArchiveHandle zip;
   ASSERT_EQ(0, OpenArchive(temp_file.path, &zip));
@@ -153,7 +153,7 @@
 TEST(InstallTest, SetUpNonAbUpdateCommands_MissingUpdateBinary) {
   TemporaryFile temp_file;
   // The archive must have something to be opened correctly.
-  BuildZipArchive({ { "dummy_entry", "" } }, temp_file.release(), kCompressStored);
+  BuildZipArchive({ { "fake_entry", "" } }, temp_file.release(), kCompressStored);
 
   // Missing update binary.
   ZipArchiveHandle zip;
@@ -334,7 +334,7 @@
   metadata = android::base::Join(
       std::vector<std::string>{
           "ota-type=BRICK",
-          "pre-device=dummy_device_type",
+          "pre-device=fake_device_type",
       },
       "\n");
   TestCheckPackageMetadata(metadata, OtaType::BRICK, false);
@@ -358,7 +358,7 @@
       std::vector<std::string>{
           "ota-type=BRICK",
           "pre-device=" + device,
-          "serialno=dummy_serial",
+          "serialno=fake_serial",
       },
       "\n");
   TestCheckPackageMetadata(metadata, OtaType::BRICK, false);
@@ -383,7 +383,7 @@
   ASSERT_NE("", serialno);
 
   std::vector<std::string> serial_numbers;
-  // Creates a dummy serial number string.
+  // Creates a fake serial number string.
   for (char c = 'a'; c <= 'z'; c++) {
     serial_numbers.emplace_back(serialno.size(), c);
   }
@@ -431,7 +431,7 @@
       std::vector<std::string>{
           "ota-type=AB",
           "pre-device=" + device,
-          "pre-build-incremental=dummy_build",
+          "pre-build-incremental=fake_build",
           "post-timestamp=" + std::to_string(std::numeric_limits<int64_t>::max()),
       },
       "\n");
@@ -459,7 +459,7 @@
       std::vector<std::string>{
           "ota-type=AB",
           "pre-device=" + device,
-          "pre-build=dummy_build_fingerprint",
+          "pre-build=fake_build_fingerprint",
           "post-timestamp=" + std::to_string(std::numeric_limits<int64_t>::max()),
       },
       "\n");
@@ -487,7 +487,7 @@
       std::vector<std::string>{
           "ota-type=AB",
           "pre-device=" + device,
-          "pre-build=dummy_build_fingerprint",
+          "pre-build=fake_build_fingerprint",
           "post-timestamp=" + std::to_string(std::numeric_limits<int64_t>::max()),
       },
       "\n");
diff --git a/tests/unit/zip_test.cpp b/tests/unit/zip_test.cpp
index 0753d64..ec9585c 100644
--- a/tests/unit/zip_test.cpp
+++ b/tests/unit/zip_test.cpp
@@ -28,7 +28,7 @@
 #include "otautil/sysutil.h"
 
 TEST(ZipTest, OpenFromMemory) {
-  std::string zip_path = from_testdata_base("ziptest_dummy-update.zip");
+  std::string zip_path = from_testdata_base("ziptest_fake-update.zip");
   MemMapping map;
   ASSERT_TRUE(map.MapFile(zip_path));
 
diff --git a/updater/commands.cpp b/updater/commands.cpp
index aed6336..1a7c272 100644
--- a/updater/commands.cpp
+++ b/updater/commands.cpp
@@ -128,7 +128,6 @@
       // No stashes, only source ranges.
       SourceInfo result(src_hash, src_ranges, {}, {});
 
-      // Sanity check the block count.
       if (result.blocks() != src_blocks) {
         *err =
             android::base::StringPrintf("mismatching block count: %zu (%s) vs %zu", result.blocks(),
@@ -262,7 +261,7 @@
       return {};
     }
   } else if (op == Type::ABORT) {
-    // No-op, other than sanity checking the input args.
+    // Abort takes no arguments, so there's nothing else to check.
     if (pos != tokens.size()) {
       *err = android::base::StringPrintf("invalid number of args: %zu (expected 0)",
                                          tokens.size() - pos);