diff --git a/core/fxcrt/bytestring_unittest.cpp b/core/fxcrt/bytestring_unittest.cpp
index ec89df2..fe01957 100644
--- a/core/fxcrt/bytestring_unittest.cpp
+++ b/core/fxcrt/bytestring_unittest.cpp
@@ -684,9 +684,8 @@
   EXPECT_FALSE(empty_string.Find('a').has_value());
   EXPECT_FALSE(empty_string.Find('\0').has_value());
 
-  Optional<size_t> result;
   ByteString single_string("a");
-  result = single_string.Find('a');
+  Optional<size_t> result = single_string.Find('a');
   ASSERT_TRUE(result.has_value());
   EXPECT_EQ(0u, result.value());
   EXPECT_FALSE(single_string.Find('b').has_value());
@@ -733,9 +732,8 @@
   EXPECT_FALSE(empty_string.ReverseFind('a').has_value());
   EXPECT_FALSE(empty_string.ReverseFind('\0').has_value());
 
-  Optional<size_t> result;
   ByteString single_string("a");
-  result = single_string.ReverseFind('a');
+  Optional<size_t> result = single_string.ReverseFind('a');
   ASSERT_TRUE(result.has_value());
   EXPECT_EQ(0u, result.value());
   EXPECT_FALSE(single_string.ReverseFind('b').has_value());
@@ -1253,9 +1251,8 @@
   EXPECT_FALSE(empty_string.Find('a').has_value());
   EXPECT_FALSE(empty_string.Find('\0').has_value());
 
-  Optional<size_t> result;
   ByteStringView single_string("a");
-  result = single_string.Find('a');
+  Optional<size_t> result = single_string.Find('a');
   ASSERT_TRUE(result.has_value());
   EXPECT_EQ(0u, result.value());
   EXPECT_FALSE(single_string.Find('b').has_value());
diff --git a/core/fxcrt/widestring_unittest.cpp b/core/fxcrt/widestring_unittest.cpp
index 26ce498..7114ae4 100644
--- a/core/fxcrt/widestring_unittest.cpp
+++ b/core/fxcrt/widestring_unittest.cpp
@@ -692,9 +692,8 @@
   EXPECT_FALSE(empty_string.Find(L'a').has_value());
   EXPECT_FALSE(empty_string.Find(L'\0').has_value());
 
-  Optional<size_t> result;
   WideString single_string(L"a");
-  result = single_string.Find(L'a');
+  Optional<size_t> result = single_string.Find(L'a');
   ASSERT_TRUE(result.has_value());
   EXPECT_EQ(0u, result.value());
   EXPECT_FALSE(single_string.Find(L'b').has_value());
@@ -740,9 +739,8 @@
   EXPECT_FALSE(empty_string.ReverseFind(L'a').has_value());
   EXPECT_FALSE(empty_string.ReverseFind(L'\0').has_value());
 
-  Optional<size_t> result;
   WideString single_string(L"a");
-  result = single_string.ReverseFind(L'a');
+  Optional<size_t> result = single_string.ReverseFind(L'a');
   ASSERT_TRUE(result.has_value());
   EXPECT_EQ(0u, result.value());
   EXPECT_FALSE(single_string.ReverseFind(L'b').has_value());
@@ -1449,9 +1447,8 @@
   EXPECT_FALSE(empty_string.Find(L'a').has_value());
   EXPECT_FALSE(empty_string.Find(L'\0').has_value());
 
-  Optional<size_t> result;
   WideStringView single_string(L"a");
-  result = single_string.Find(L'a');
+  Optional<size_t> result = single_string.Find(L'a');
   ASSERT_TRUE(result.has_value());
   EXPECT_EQ(0u, result.value());
   EXPECT_FALSE(single_string.Find(L'b').has_value());