diff --git a/libs/androidfw/tests/AttributeResolution_bench.cpp b/libs/androidfw/tests/AttributeResolution_bench.cpp
index ddd8ab8..1c89c61 100644
--- a/libs/androidfw/tests/AttributeResolution_bench.cpp
+++ b/libs/androidfw/tests/AttributeResolution_bench.cpp
@@ -120,8 +120,8 @@
     return;
   }
 
-  std::unique_ptr<Asset> asset = assetmanager.OpenNonAsset(layout_path->to_string(), value->cookie,
-                                                           Asset::ACCESS_BUFFER);
+  std::unique_ptr<Asset> asset =
+      assetmanager.OpenNonAsset(std::string(*layout_path), value->cookie, Asset::ACCESS_BUFFER);
   if (asset == nullptr) {
     state.SkipWithError("failed to load layout");
     return;
diff --git a/libs/androidfw/tests/ConfigDescription_test.cpp b/libs/androidfw/tests/ConfigDescription_test.cpp
index ce7f805..8fed0a4 100644
--- a/libs/androidfw/tests/ConfigDescription_test.cpp
+++ b/libs/androidfw/tests/ConfigDescription_test.cpp
@@ -25,8 +25,8 @@
 
 namespace android {
 
-static ::testing::AssertionResult TestParse(
-    const StringPiece& input, ConfigDescription* config = nullptr) {
+static ::testing::AssertionResult TestParse(StringPiece input,
+                                            ConfigDescription* config = nullptr) {
   if (ConfigDescription::Parse(input, config)) {
     return ::testing::AssertionSuccess() << input << " was successfully parsed";
   }
@@ -138,7 +138,7 @@
   EXPECT_EQ(std::string("vrheadset-v26"), config.toString().string());
 }
 
-static inline ConfigDescription ParseConfigOrDie(const android::StringPiece& str) {
+static inline ConfigDescription ParseConfigOrDie(android::StringPiece str) {
   ConfigDescription config;
   CHECK(ConfigDescription::Parse(str, &config)) << "invalid configuration: " << str;
   return config;
diff --git a/libs/androidfw/tests/StringPiece_test.cpp b/libs/androidfw/tests/StringPiece_test.cpp
index 316a5c1..822e527 100644
--- a/libs/androidfw/tests/StringPiece_test.cpp
+++ b/libs/androidfw/tests/StringPiece_test.cpp
@@ -60,36 +60,4 @@
   EXPECT_TRUE(StringPiece(car) > banana);
 }
 
-TEST(StringPieceTest, ContainsOtherStringPiece) {
-  StringPiece text("I am a leaf on the wind.");
-  StringPiece start_needle("I am");
-  StringPiece end_needle("wind.");
-  StringPiece middle_needle("leaf");
-  StringPiece empty_needle("");
-  StringPiece missing_needle("soar");
-  StringPiece long_needle("This string is longer than the text.");
-
-  EXPECT_TRUE(text.contains(start_needle));
-  EXPECT_TRUE(text.contains(end_needle));
-  EXPECT_TRUE(text.contains(middle_needle));
-  EXPECT_TRUE(text.contains(empty_needle));
-  EXPECT_FALSE(text.contains(missing_needle));
-  EXPECT_FALSE(text.contains(long_needle));
-
-  StringPiece16 text16(u"I am a leaf on the wind.");
-  StringPiece16 start_needle16(u"I am");
-  StringPiece16 end_needle16(u"wind.");
-  StringPiece16 middle_needle16(u"leaf");
-  StringPiece16 empty_needle16(u"");
-  StringPiece16 missing_needle16(u"soar");
-  StringPiece16 long_needle16(u"This string is longer than the text.");
-
-  EXPECT_TRUE(text16.contains(start_needle16));
-  EXPECT_TRUE(text16.contains(end_needle16));
-  EXPECT_TRUE(text16.contains(middle_needle16));
-  EXPECT_TRUE(text16.contains(empty_needle16));
-  EXPECT_FALSE(text16.contains(missing_needle16));
-  EXPECT_FALSE(text16.contains(long_needle16));
-}
-
 }  // namespace android
diff --git a/libs/androidfw/tests/StringPool_test.cpp b/libs/androidfw/tests/StringPool_test.cpp
index 047d457..0e0acae 100644
--- a/libs/androidfw/tests/StringPool_test.cpp
+++ b/libs/androidfw/tests/StringPool_test.cpp
@@ -321,15 +321,15 @@
   ASSERT_EQ(test.setTo(data.get(), buffer.size()), NO_ERROR);
   auto str = test.string8At(0);
   ASSERT_TRUE(str.has_value());
-  EXPECT_THAT(str->to_string(), Eq("\xED\xA0\x81\xED\xB0\x80"));
+  EXPECT_THAT(*str, Eq("\xED\xA0\x81\xED\xB0\x80"));
 
   str = test.string8At(1);
   ASSERT_TRUE(str.has_value());
-  EXPECT_THAT(str->to_string(), Eq("foo \xED\xA0\x81\xED\xB0\xB7 bar"));
+  EXPECT_THAT(*str, Eq("foo \xED\xA0\x81\xED\xB0\xB7 bar"));
 
   str = test.string8At(2);
   ASSERT_TRUE(str.has_value());
-  EXPECT_THAT(str->to_string(), Eq("\xED\xA0\x81\xED\xB0\x80\xED\xA0\x81\xED\xB0\xB7"));
+  EXPECT_THAT(*str, Eq("\xED\xA0\x81\xED\xB0\x80\xED\xA0\x81\xED\xB0\xB7"));
 
   // Check that retrieving the strings returns the original UTF-8 character bytes
   EXPECT_THAT(android::util::GetString(test, 0), Eq("\xF0\x90\x90\x80"));