diff --git a/include/internal/catch_stringref.cpp b/include/internal/catch_stringref.cpp
index b0b2f8e1..604e8465 100644
--- a/include/internal/catch_stringref.cpp
+++ b/include/internal/catch_stringref.cpp
@@ -112,7 +112,7 @@ namespace Catch {
     }
 
     auto operator << ( std::ostream& os, StringRef const& str ) -> std::ostream& {
-        return os << str.c_str();
+        return os.write(str.m_start, str.m_size);
     }
 
 } // namespace Catch
diff --git a/include/internal/catch_stringref.h b/include/internal/catch_stringref.h
index 0f9e7801..1c7e6cbe 100644
--- a/include/internal/catch_stringref.h
+++ b/include/internal/catch_stringref.h
@@ -12,7 +12,7 @@
 #include <iosfwd>
 
 namespace Catch {
-    
+
     class StringData;
 
     /// A non-owning string class (similar to the forthcoming std::string_view)
@@ -31,13 +31,13 @@ namespace Catch {
 
         char const* m_start;
         size_type m_size;
-        
+
         char* m_data = nullptr;
-        
+
         void takeOwnership();
 
         static constexpr char const* const s_empty = "";
-        
+
     public: // construction/ assignment
         StringRef() noexcept
         :   StringRef( s_empty, 0 )
@@ -83,13 +83,15 @@ namespace Catch {
         operator std::string() const;
 
         void swap( StringRef& other ) noexcept;
-        
+
+        friend auto operator << (std::ostream& os, StringRef const& sr)->std::ostream&;
+
     public: // operators
         auto operator == ( StringRef const& other ) const noexcept -> bool;
         auto operator != ( StringRef const& other ) const noexcept -> bool;
-        
+
         auto operator[] ( size_type index ) const noexcept -> char;
-        
+
     public: // named queries
         auto empty() const noexcept -> bool {
             return m_size == 0;
@@ -100,7 +102,7 @@ namespace Catch {
 
         auto numberOfCharacters() const noexcept -> size_type;
         auto c_str() const -> char const*;
-        
+
     public: // substrings and searches
         auto substr( size_type start, size_type size ) const noexcept -> StringRef;
 
@@ -114,7 +116,6 @@ namespace Catch {
     auto operator + ( StringRef const& lhs, char const* rhs ) -> std::string;
     auto operator + ( char const* lhs, StringRef const& rhs ) -> std::string;
 
-    auto operator << ( std::ostream& os, StringRef const& sr ) -> std::ostream&;
 
     inline auto operator "" _sr( char const* rawChars, std::size_t size ) noexcept -> StringRef {
         return StringRef( rawChars, size );
diff --git a/projects/SelfTest/Baselines/compact.sw.approved.txt b/projects/SelfTest/Baselines/compact.sw.approved.txt
index 7988402a..2cbed817 100644
--- a/projects/SelfTest/Baselines/compact.sw.approved.txt
+++ b/projects/SelfTest/Baselines/compact.sw.approved.txt
@@ -627,7 +627,10 @@ String.tests.cpp:<line number>: passed: isOwned( s ) == false for: false == fals
 String.tests.cpp:<line number>: passed: s.c_str() == rawChars for: "hello" == "hello"
 String.tests.cpp:<line number>: passed: isOwned( s ) == false for: false == false
 String.tests.cpp:<line number>: passed: original == "original"
-String.tests.cpp:<line number>: failed: isSubstring( original ) for: false
+String.tests.cpp:<line number>: passed: isSubstring( original ) for: true
+String.tests.cpp:<line number>: passed: isOwned( original ) == false for: false == false
+String.tests.cpp:<line number>: passed: isSubstring( original ) == false for: false == false
+String.tests.cpp:<line number>: passed: isOwned( original ) for: true
 String.tests.cpp:<line number>: passed: ss.empty() == false for: false == false
 String.tests.cpp:<line number>: passed: ss.size() == 5 for: 5 == 5
 String.tests.cpp:<line number>: passed: std::strcmp( ss.c_str(), "hello" ) == 0 for: 0 == 0
@@ -1077,5 +1080,5 @@ Misc.tests.cpp:<line number>: passed: v.size() == 5 for: 5 == 5
 Misc.tests.cpp:<line number>: passed: v.capacity() >= 5 for: 5 >= 5
 Misc.tests.cpp:<line number>: passed:
 Misc.tests.cpp:<line number>: passed:
-Failed 63 test cases, failed 122 assertions.
+Failed 62 test cases, failed 121 assertions.
 
diff --git a/projects/SelfTest/Baselines/console.sw.approved.txt b/projects/SelfTest/Baselines/console.sw.approved.txt
index 8ffefb8c..dd81bad9 100644
--- a/projects/SelfTest/Baselines/console.sw.approved.txt
+++ b/projects/SelfTest/Baselines/console.sw.approved.txt
@@ -4998,10 +4998,29 @@ String.tests.cpp:<line number>:
 PASSED:
   REQUIRE( original == "original" )
 
-String.tests.cpp:<line number>: FAILED:
+String.tests.cpp:<line number>:
+PASSED:
   REQUIRE( isSubstring( original ) )
 with expansion:
-  false
+  true
+
+String.tests.cpp:<line number>:
+PASSED:
+  REQUIRE( isOwned( original ) == false )
+with expansion:
+  false == false
+
+String.tests.cpp:<line number>:
+PASSED:
+  REQUIRE( isSubstring( original ) == false )
+with expansion:
+  false == false
+
+String.tests.cpp:<line number>:
+PASSED:
+  REQUIRE( isOwned( original ) )
+with expansion:
+  true
 
 -------------------------------------------------------------------------------
 StringRef
@@ -8531,6 +8550,6 @@ Misc.tests.cpp:<line number>:
 PASSED:
 
 ===============================================================================
-test cases:  202 | 135 passed |  63 failed |  4 failed as expected
-assertions: 1018 | 875 passed | 122 failed | 21 failed as expected
+test cases:  202 | 136 passed |  62 failed |  4 failed as expected
+assertions: 1021 | 879 passed | 121 failed | 21 failed as expected
 
diff --git a/projects/SelfTest/Baselines/junit.sw.approved.txt b/projects/SelfTest/Baselines/junit.sw.approved.txt
index 8fac923f..895e41f9 100644
--- a/projects/SelfTest/Baselines/junit.sw.approved.txt
+++ b/projects/SelfTest/Baselines/junit.sw.approved.txt
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <testsuitesloose text artifact
 >
-  <testsuite name="<exe-name>" errors="17" failures="106" tests="1019" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
+  <testsuite name="<exe-name>" errors="17" failures="105" tests="1022" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
     <testcase classname="<exe-name>.global" name="# A test name that starts with a #" time="{duration}"/>
     <testcase classname="<exe-name>.global" name="#1005: Comparing pointer to int and long (NULL can be either on various systems)" time="{duration}"/>
     <testcase classname="<exe-name>.global" name="#1027" time="{duration}"/>
@@ -546,11 +546,7 @@ Matchers.tests.cpp:<line number>
     <testcase classname="<exe-name>.global" name="StringRef/Empty string" time="{duration}"/>
     <testcase classname="<exe-name>.global" name="StringRef/From string literal" time="{duration}"/>
     <testcase classname="<exe-name>.global" name="StringRef/From string literal/c_str() does not cause copy" time="{duration}"/>
-    <testcase classname="<exe-name>.global" name="StringRef/From sub-string" time="{duration}">
-      <failure message="false" type="REQUIRE">
-String.tests.cpp:<line number>
-      </failure>
-    </testcase>
+    <testcase classname="<exe-name>.global" name="StringRef/From sub-string" time="{duration}"/>
     <testcase classname="<exe-name>.global" name="StringRef/Substrings/zero-based substring" time="{duration}"/>
     <testcase classname="<exe-name>.global" name="StringRef/Substrings/c_str() causes copy" time="{duration}"/>
     <testcase classname="<exe-name>.global" name="StringRef/Substrings/non-zero-based substring" time="{duration}"/>
diff --git a/projects/SelfTest/Baselines/xml.sw.approved.txt b/projects/SelfTest/Baselines/xml.sw.approved.txt
index 01978f3d..8942b851 100644
--- a/projects/SelfTest/Baselines/xml.sw.approved.txt
+++ b/projects/SelfTest/Baselines/xml.sw.approved.txt
@@ -5716,15 +5716,39 @@ Message from section two
             original == "original"
           </Expanded>
         </Expression>
-        <Expression success="false" type="REQUIRE" filename="projects/<exe-name>/IntrospectiveTests/String.tests.cpp" >
+        <Expression success="true" type="REQUIRE" filename="projects/<exe-name>/IntrospectiveTests/String.tests.cpp" >
           <Original>
             isSubstring( original )
           </Original>
           <Expanded>
-            false
+            true
           </Expanded>
         </Expression>
-        <OverallResults successes="1" failures="1" expectedFailures="0"/>
+        <Expression success="true" type="REQUIRE" filename="projects/<exe-name>/IntrospectiveTests/String.tests.cpp" >
+          <Original>
+            isOwned( original ) == false
+          </Original>
+          <Expanded>
+            false == false
+          </Expanded>
+        </Expression>
+        <Expression success="true" type="REQUIRE" filename="projects/<exe-name>/IntrospectiveTests/String.tests.cpp" >
+          <Original>
+            isSubstring( original ) == false
+          </Original>
+          <Expanded>
+            false == false
+          </Expanded>
+        </Expression>
+        <Expression success="true" type="REQUIRE" filename="projects/<exe-name>/IntrospectiveTests/String.tests.cpp" >
+          <Original>
+            isOwned( original )
+          </Original>
+          <Expanded>
+            true
+          </Expanded>
+        </Expression>
+        <OverallResults successes="5" failures="0" expectedFailures="0"/>
       </Section>
       <Section name="Substrings" filename="projects/<exe-name>/IntrospectiveTests/String.tests.cpp" >
         <Section name="zero-based substring" filename="projects/<exe-name>/IntrospectiveTests/String.tests.cpp" >
@@ -6054,7 +6078,7 @@ Message from section two
         </Expression>
         <OverallResults successes="3" failures="0" expectedFailures="0"/>
       </Section>
-      <OverallResult success="false"/>
+      <OverallResult success="true"/>
     </TestCase>
     <TestCase name="Stringifying std::chrono::duration helpers" tags="[chrono][toString]" filename="projects/<exe-name>/UsageTests/ToStringChrono.tests.cpp" >
       <Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/ToStringChrono.tests.cpp" >
@@ -9381,7 +9405,7 @@ loose text artifact
       </Section>
       <OverallResult success="true"/>
     </TestCase>
-    <OverallResults successes="875" failures="123" expectedFailures="21"/>
+    <OverallResults successes="879" failures="122" expectedFailures="21"/>
   </Group>
-  <OverallResults successes="875" failures="122" expectedFailures="21"/>
+  <OverallResults successes="879" failures="121" expectedFailures="21"/>
 </Catch>