diff --git a/extensions/bingtranslate.cpp b/extensions/bingtranslate.cpp
index 04691fb..a073fa5 100644
--- a/extensions/bingtranslate.cpp
+++ b/extensions/bingtranslate.cpp
@@ -130,7 +130,7 @@ bool ProcessSentence(std::wstring& sentence, SentenceInfo sentenceInfo)
 TEST(
 	{
 		std::wstring test = L"こんにちは";
-		ProcessSentence(test, SentenceInfo{ SentenceInfo::DUMMY });
+		ProcessSentence(test, { SentenceInfo::DUMMY });
 		assert(test.find(L"Hello") != std::wstring::npos);
 	}
 );
diff --git a/extensions/googletranslate.cpp b/extensions/googletranslate.cpp
index 384a3bd..90d1368 100644
--- a/extensions/googletranslate.cpp
+++ b/extensions/googletranslate.cpp
@@ -166,7 +166,7 @@ bool ProcessSentence(std::wstring& sentence, SentenceInfo sentenceInfo)
 TEST(
 	{
 		std::wstring test = L"こんにちは";
-		ProcessSentence(test, SentenceInfo{ SentenceInfo::DUMMY });
+		ProcessSentence(test, { SentenceInfo::DUMMY });
 		assert(test.find(L"Hello") != std::wstring::npos);
 	}
 );
diff --git a/extensions/network.h b/extensions/network.h
index 3131e91..d47b53f 100644
--- a/extensions/network.h
+++ b/extensions/network.h
@@ -5,7 +5,7 @@
 
 using InternetHandle = AutoHandle<Functor<WinHttpCloseHandle>>;
 
-std::optional<std::wstring> ReceiveHttpRequest(HINTERNET request)
+inline std::optional<std::wstring> ReceiveHttpRequest(HINTERNET request)
 {
 	WinHttpReceiveResponse(request, NULL);
 	std::string data;
@@ -17,14 +17,14 @@ std::optional<std::wstring> ReceiveHttpRequest(HINTERNET request)
 		if (!dwSize) break;
 		std::vector<char> buffer(dwSize);
 		WinHttpReadData(request, buffer.data(), dwSize, &dwDownloaded);
-		data += std::string(buffer.data(), dwDownloaded);
+		data.append(buffer.data(), dwDownloaded);
 	} while (dwSize > 0);
 
 	if (data.empty()) return {};
 	return StringToWideString(data);
 }
 
-void Escape(std::wstring& text)
+inline void Escape(std::wstring& text)
 {
 	for (int i = 0; i < text.size(); ++i)
 	{
diff --git a/extensions/removerepeat.cpp b/extensions/removerepeat.cpp
index 3a66393..691bcc9 100644
--- a/extensions/removerepeat.cpp
+++ b/extensions/removerepeat.cpp
@@ -61,11 +61,10 @@ TEST(
 		RemoveCyclicRepeats(cyclicRepeats);
 		assert(cyclicRepeats == L"abcdefg");
 
-		InfoForExtension tester{ "hook address", 0 };
 		std::wstring empty = L"", one = L" ", normal = L"This is a normal sentence. はい";
-		ProcessSentence(empty, { &tester });
-		ProcessSentence(one, { &tester });
-		ProcessSentence(normal, { &tester });
+		ProcessSentence(empty, { SentenceInfo::DUMMY });
+		ProcessSentence(one, { SentenceInfo::DUMMY });
+		ProcessSentence(normal, { SentenceInfo::DUMMY });
 		assert(empty == L"" && one == L" " && normal == L"This is a normal sentence. はい");
 	}
 );