diff --git a/tests/functional/repl_characterization/repl_characterization.cc b/tests/functional/repl_characterization/repl_characterization.cc
index d46f09553..68a66b2f3 100644
--- a/tests/functional/repl_characterization/repl_characterization.cc
+++ b/tests/functional/repl_characterization/repl_characterization.cc
@@ -16,10 +16,10 @@ using namespace std::string_literals;
 
 namespace nix {
 
-static constexpr const char * REPL_PROMPT = "nix-repl> ";
+static constexpr const std::string_view REPL_PROMPT = "nix-repl> ";
 
 // ASCII ENQ character
-static constexpr const char * AUTOMATION_PROMPT = "\x05";
+static constexpr const std::string_view AUTOMATION_PROMPT = "\x05";
 
 static std::string_view trimOutLog(std::string_view outLog)
 {
@@ -42,7 +42,7 @@ public:
 
     void runReplTest(std::string_view const & content, std::vector<std::string> extraArgs = {}) const
     {
-        auto syntax = CLILiterateParser::parse(REPL_PROMPT, content);
+        auto syntax = CLILiterateParser::parse(std::string(REPL_PROMPT), content);
 
         // FIXME: why does this need two --quiets
         // show-trace is on by default due to test configuration, but is not a standard
@@ -52,7 +52,7 @@ public:
         auto nixBin = canonPath(getEnvNonEmpty("NIX_BIN_DIR").value_or(NIX_BIN_DIR));
 
         auto process = RunningProcess::start(nixBin + "/nix", args);
-        auto session = TestSession{AUTOMATION_PROMPT, std::move(process)};
+        auto session = TestSession{std::string(AUTOMATION_PROMPT), std::move(process)};
 
         for (auto & bit : syntax) {
             if (bit.kind != CLILiterateParser::NodeKind::COMMAND) {
@@ -72,7 +72,7 @@ public:
         auto replacedOutLog = boost::algorithm::replace_all_copy(session.outLog, unitTestData, "TEST_DATA");
         auto cleanedOutLog = trimOutLog(replacedOutLog);
 
-        auto parsedOutLog = CLILiterateParser::parse(AUTOMATION_PROMPT, cleanedOutLog, 0);
+        auto parsedOutLog = CLILiterateParser::parse(std::string(AUTOMATION_PROMPT), cleanedOutLog, 0);
 
         parsedOutLog = CLILiterateParser::tidyOutputForComparison(std::move(parsedOutLog));
         syntax = CLILiterateParser::tidyOutputForComparison(std::move(syntax));
@@ -85,7 +85,7 @@ TEST_F(ReplSessionTest, parses)
 {
     writeTest("basic.ast", [this]() {
         const std::string content = readFile(goldenMaster("basic.test"));
-        auto parser = CLILiterateParser{REPL_PROMPT};
+        auto parser = CLILiterateParser{std::string(REPL_PROMPT)};
         parser.feed(content);
 
         std::ostringstream out{};
@@ -97,7 +97,7 @@ TEST_F(ReplSessionTest, parses)
 
     writeTest("basic_tidied.ast", [this]() {
         const std::string content = readFile(goldenMaster("basic.test"));
-        auto syntax = CLILiterateParser::parse(REPL_PROMPT, content);
+        auto syntax = CLILiterateParser::parse(std::string(REPL_PROMPT), content);
 
         syntax = CLILiterateParser::tidyOutputForComparison(std::move(syntax));