diff --git a/src/RE.cc b/src/RE.cc
index 5b3aa944ea..5624d2350c 100644
--- a/src/RE.cc
+++ b/src/RE.cc
@@ -189,24 +189,37 @@ std::string Specific_RE_Matcher::LookupDef(const std::string& def) {
     return {};
 }
 
-bool Specific_RE_Matcher::MatchAll(const char* s) { return MatchAll((const u_char*)(s), strlen(s)); }
+bool Specific_RE_Matcher::MatchAll(const char* s) { return MatchAll(std::string_view{s}); }
 
-bool Specific_RE_Matcher::MatchAll(const String* s) {
-    // s->Len() does not include '\0'.
-    return MatchAll(s->Bytes(), s->Len());
+bool Specific_RE_Matcher::MatchAll(const String* s) { return MatchAll(s->ToStdStringView()); }
+
+bool Specific_RE_Matcher::MatchAll(std::string_view sv) {
+    return MatchAll(reinterpret_cast<const u_char*>(sv.data()), sv.size());
 }
 
 bool Specific_RE_Matcher::MatchSet(const String* s, std::vector<AcceptIdx>& matches) {
     return MatchAll(s->Bytes(), s->Len(), &matches);
 }
 
-int Specific_RE_Matcher::Match(const char* s) { return Match((const u_char*)(s), strlen(s)); }
+bool Specific_RE_Matcher::MatchSet(std::string_view sv, std::vector<AcceptIdx>& matches) {
+    return MatchAll(reinterpret_cast<const u_char*>(sv.data()), sv.size(), &matches);
+}
 
-int Specific_RE_Matcher::Match(const String* s) { return Match(s->Bytes(), s->Len()); }
+int Specific_RE_Matcher::Match(const char* s) { return Match(std::string_view{s}); }
 
-int Specific_RE_Matcher::LongestMatch(const char* s) { return LongestMatch((const u_char*)(s), strlen(s)); }
+int Specific_RE_Matcher::Match(const String* s) { return Match(s->ToStdStringView()); }
 
-int Specific_RE_Matcher::LongestMatch(const String* s) { return LongestMatch(s->Bytes(), s->Len()); }
+int Specific_RE_Matcher::Match(std::string_view sv) {
+    return Match(reinterpret_cast<const u_char*>(sv.data()), sv.size());
+}
+
+int Specific_RE_Matcher::LongestMatch(const char* s) { return LongestMatch(std::string_view{s}); }
+
+int Specific_RE_Matcher::LongestMatch(const String* s) { return LongestMatch(s->ToStdStringView()); }
+
+int Specific_RE_Matcher::LongestMatch(std::string_view sv) {
+    return LongestMatch(reinterpret_cast<const u_char*>(sv.data()), sv.size());
+}
 
 bool Specific_RE_Matcher::MatchAll(const u_char* bv, int n, std::vector<AcceptIdx>* matches) {
     if ( ! dfa )
diff --git a/src/RE.h b/src/RE.h
index 5ba41531f8..e30c17fce8 100644
--- a/src/RE.h
+++ b/src/RE.h
@@ -7,6 +7,7 @@
 #include <map>
 #include <set>
 #include <string>
+#include <string_view>
 
 #include "zeek/CCL.h"
 #include "zeek/EquivClass.h"
@@ -89,6 +90,7 @@ public:
 
     bool MatchAll(const char* s);
     bool MatchAll(const String* s);
+    bool MatchAll(std::string_view sv);
 
     // Compiles a set of regular expressions simultaneously.
     // 'idx' contains indices associated with the expressions.
@@ -104,16 +106,21 @@ public:
     // Behaves as MatchAll(), consuming the complete input string.
     bool MatchSet(const String* s, std::vector<AcceptIdx>& matches);
 
+    // As MatchSet() above, but taking a std::string_view.
+    bool MatchSet(std::string_view sv, std::vector<AcceptIdx>& matches);
+
     // Returns the position in s just beyond where the first match
     // occurs, or 0 if there is no such position in s.  Note that
     // if the pattern matches empty strings, matching continues
     // in an attempt to match at least one character.
     int Match(const char* s);
     int Match(const String* s);
+    int Match(std::string_view sv);
     int Match(const u_char* bv, int n);
 
     int LongestMatch(const char* s);
     int LongestMatch(const String* s);
+    int LongestMatch(std::string_view sv);
     int LongestMatch(const u_char* bv, int n, bool bol = true, bool eol = true);
 
     EquivClass* EC() { return &equiv_class; }
diff --git a/testing/btest/Baseline/cluster.telemetry.ws-invalid-app/client..stdout b/testing/btest/Baseline/cluster.telemetry.ws-invalid-app/client.out
similarity index 100%
rename from testing/btest/Baseline/cluster.telemetry.ws-invalid-app/client..stdout
rename to testing/btest/Baseline/cluster.telemetry.ws-invalid-app/client.out