diff --git a/src/core/platform.h b/src/core/platform.h
index ba40bcc..7667c26 100644
--- a/src/core/platform.h
+++ b/src/core/platform.h
@@ -335,7 +335,7 @@
 // RTEMS errors are probably just a buildsys issue & this will change or go away.
 // Redox will probably implement this in the future.
 
-#define CAN_UNLINK_WHILE_OPEN       (!IS_AROS && !IS_RISCOS && !IS_REDOX)
+#define CAN_UNLINK_WHILE_OPEN       (!IS_AROS && !IS_RISCOS && !IS_REDOX && !IS_DOS_DJGPP)
 
 #define SUPPORTS_DOUBLE_SLASH_PATH  (IS_CYGWIN)
 // POSIX standard says paths beginning with 2 slashes are "implementation defined"
diff --git a/src/twtest/archive_t.cpp b/src/twtest/archive_t.cpp
index cf6410f..260ec4b 100644
--- a/src/twtest/archive_t.cpp
+++ b/src/twtest/archive_t.cpp
@@ -38,6 +38,7 @@
 #include "core/archive.h"
 #include "twtest/test.h"
 #include "core/error.h"
+#include "tw/twutil.h"
 #include <stdio.h>
 
 TSS_EXCEPTION(eTestArchiveError, eError);
@@ -119,6 +120,12 @@ void TestLockedTemporaryArchive()
         lockedArch.OpenReadWrite();
         lockedArch.Close();
     }
+    catch (eError& e)
+    {
+        threw=true;
+        TCERR << "Error opening locked temp archive" << std::endl;
+        cTWUtil::PrintErrorMsg(e);
+    }
     catch (...)
     {
         threw = true;
@@ -142,6 +149,12 @@ void TestLockedTemporaryArchive()
         // this should delete the file
         lockedArch.Close();
     }
+    catch (eError& e)
+    {
+        threw=true;
+        TCERR << "Error writing locked temp archive" << std::endl;        
+        cTWUtil::PrintErrorMsg(e);
+    }
     catch (...)
     {
         threw = true;
@@ -215,6 +228,6 @@ void TestFileArchive()
 void RegisterSuite_Archive()
 {
     RegisterTest("Archive", "MemoryArchive", TestMemoryArchive);
-    RegisterTest("Archive", "LockedTemporaryArchive)", TestLockedTemporaryArchive);
+    RegisterTest("Archive", "LockedTemporaryArchive", TestLockedTemporaryArchive);
     RegisterTest("Archive", "FileArchive",   TestFileArchive);
 }
diff --git a/src/twtest/charutil_t.cpp b/src/twtest/charutil_t.cpp
index 13d7c38..79166b7 100644
--- a/src/twtest/charutil_t.cpp
+++ b/src/twtest/charutil_t.cpp
@@ -42,6 +42,21 @@
 #include "core/errorbucketimpl.h"
 #include "twtest/test.h"
 
+#include <algorithm>
+
+bool localeIsUtf8()
+{
+    std::string locale(setlocale(LC_CTYPE, 0));
+    std::transform(locale.begin(), locale.end(), locale.begin(), ::tolower);
+
+    if(locale.find("utf-8") != std::string::npos)
+        return true;
+
+    if(locale.find("utf8") != std::string::npos)
+        return true;
+
+    return false;
+}
 
 void CheckChars( const TSTRING& str, int length_expected = 1)
 {
@@ -52,6 +67,8 @@ void CheckChars( const TSTRING& str, int length_expected = 1)
     while( cCharUtil::PopNextChar( cur, end, first, last ) )
     {
         int length = (int)(last - first);
+        if (length != length_expected )
+            TCERR << "CheckChars on '" << str << "' : expected = " << length_expected << " | observed = " << length << std::endl;
         TEST(length == length_expected);
     }
 }
@@ -63,7 +80,11 @@ void TestCharUtilBasic()
 {
     CheckChars( "foo" );
     CheckChars( "fo\x23 54" );
-    CheckChars( "\U0001F408", 4 );  //Cat emoji. Assumes UTF-8
+
+    if(localeIsUtf8())
+        CheckChars( "\U0001F408", 4 );  //Cat emoji, if UTF-8
+    else
+        CheckChars( "\U0001F408", 1 );  // just a bag of bytes otherwise
 }
 
 void RegisterSuite_CharUtil()
diff --git a/src/twtest/platform_t.cpp b/src/twtest/platform_t.cpp
index fffdf4d..ccfd667 100644
--- a/src/twtest/platform_t.cpp
+++ b/src/twtest/platform_t.cpp
@@ -246,7 +246,7 @@ const TSTRING expected_os("Darwin");
 #elif IS_CYGWIN
 const TSTRING expected_os("Cygwin");
 #elif IS_DOS_DJGPP
-const TSTRING expected_os("DJGPP");
+const TSTRING expected_os("FreeDOS"); // This will likely fail for other DOS flavors
 #elif IS_ANDROID
 const TSTRING expected_os("Android");
 #elif IS_DRAGONFLYBSD
@@ -308,6 +308,10 @@ void TestPlatformDetection()
     TEST( uname(&os_info) == 0);
 
     TSTRING observed_os(os_info.sysname);
+
+    if ( observed_os != expected_os )
+        TCERR << "Expected OS: " << expected_os << " | Observed OS: " << observed_os << std::endl;
+
     TEST( observed_os == expected_os );
 #endif
 }
diff --git a/src/twtest/tasktimer_t.cpp b/src/twtest/tasktimer_t.cpp
index ae774bd..b702093 100644
--- a/src/twtest/tasktimer_t.cpp
+++ b/src/twtest/tasktimer_t.cpp
@@ -53,7 +53,7 @@ void TestTaskTimer()
     }
 
     TEST(!timer.IsRunning());
-    TEST(5 >= timer.GetTotalTime());
+    TEST(5 <= timer.GetTotalTime());
     TEST(5 == timer.GetNumTimesStarted());
 }