diff --git a/swift/logging/SwiftDiagnostics.h b/swift/logging/SwiftDiagnostics.h
index c42a3ec781e..ce5dd241778 100644
--- a/swift/logging/SwiftDiagnostics.h
+++ b/swift/logging/SwiftDiagnostics.h
@@ -66,31 +66,6 @@ struct SwiftDiagnostic {
   }
 };
 
-class SwiftDiagnosticsDumper {
- public:
-  // opens path for writing out JSON entries. Returns whether the operation was successful.
-  bool open(const std::filesystem::path& path) {
-    output.open(path);
-    return output.good();
-  }
-
-  void flush() { output.flush(); }
-
-  void write(const SwiftDiagnostic& source,
-             const std::chrono::system_clock::time_point& timestamp,
-             std::string_view message) {
-    if (output) {
-      output << source.json(timestamp, message) << '\n';
-    }
-  }
-
-  bool good() const { return output.good(); }
-  explicit operator bool() const { return good(); }
-
- private:
-  std::ofstream output;
-};
-
 constexpr SwiftDiagnostic internalError{
     "internal-error",
     "Internal error",
diff --git a/swift/logging/SwiftLogging.cpp b/swift/logging/SwiftLogging.cpp
index e4db45f9872..2f01c4fa0b0 100644
--- a/swift/logging/SwiftLogging.cpp
+++ b/swift/logging/SwiftLogging.cpp
@@ -138,7 +138,8 @@ void Log::configure() {
     std::error_code ec;
     std::filesystem::create_directories(diagFile.parent_path(), ec);
     if (!ec) {
-      if (!diagnostics.open(diagFile)) {
+      diagnostics.open(diagFile);
+      if (!diagnostics) {
         problems.emplace_back("Unable to open diagnostics json file " + diagFile.string());
       }
     } else {
@@ -168,6 +169,14 @@ void Log::flushImpl() {
   }
 }
 
+void Log::diagnoseImpl(const SwiftDiagnostic& source,
+                       const std::chrono::system_clock::time_point& time,
+                       std::string_view message) {
+  if (diagnostics) {
+    diagnostics << source.json(time, message) << '\n';
+  }
+}
+
 Log::LoggerConfiguration Log::getLoggerConfigurationImpl(std::string_view name) {
   LoggerConfiguration ret{session, std::string{programName}};
   ret.fullyQualifiedName += '/';
diff --git a/swift/logging/SwiftLogging.h b/swift/logging/SwiftLogging.h
index 33e9d87770a..04dfbf2a8b1 100644
--- a/swift/logging/SwiftLogging.h
+++ b/swift/logging/SwiftLogging.h
@@ -126,7 +126,7 @@ class Log {
   static void diagnose(const SwiftDiagnostic& source,
                        const std::chrono::system_clock::time_point& time,
                        std::string_view message) {
-    instance().diagnostics.write(source, time, message);
+    instance().diagnoseImpl(source, time, message);
   }
 
  private:
@@ -144,6 +144,9 @@ class Log {
 
   void configure();
   void flushImpl();
+  void diagnoseImpl(const SwiftDiagnostic& source,
+                    const std::chrono::system_clock::time_point& time,
+                    std::string_view message);
 
   LoggerConfiguration getLoggerConfigurationImpl(std::string_view name);
 
@@ -183,7 +186,7 @@ class Log {
   FilteredOutput<std::ofstream> binary{Level::no_logs};
   FilteredOutput<binlog::TextOutputStream> text{Level::info, textFile, format};
   FilteredOutput<binlog::TextOutputStream> console{Level::warning, std::cerr, format};
-  SwiftDiagnosticsDumper diagnostics{};
+  std::ofstream diagnostics{};
   LevelRules sourceRules;
   std::vector<std::string> collectLevelRulesAndReturnProblems(const char* envVar);
 };