diff --git a/sys/embunit/TestCaller.c b/sys/embunit/TestCaller.c
index 0028e2af63..66cf3e2ea6 100644
--- a/sys/embunit/TestCaller.c
+++ b/sys/embunit/TestCaller.c
@@ -36,7 +36,7 @@
 #include "TestCase.h"
 #include "TestCaller.h"
 
-char* TestCaller_name(TestCaller* self)
+const char* TestCaller_name(TestCaller* self)
 {
     return self->name;
 }
diff --git a/sys/embunit/TestCase.c b/sys/embunit/TestCase.c
index 6efb5d8b44..0f24a7815c 100644
--- a/sys/embunit/TestCase.c
+++ b/sys/embunit/TestCase.c
@@ -39,7 +39,7 @@
 static TestResult* result_;
 static TestCase* self_;
 
-char* TestCase_name(TestCase* self)
+const char* TestCase_name(TestCase* self)
 {
     return self->name;
 }
diff --git a/sys/include/embUnit/TestCaller.h b/sys/include/embUnit/TestCaller.h
index 0b99cd900f..c99bb4a375 100644
--- a/sys/include/embUnit/TestCaller.h
+++ b/sys/include/embUnit/TestCaller.h
@@ -43,7 +43,7 @@ typedef struct __TestFixture    TestFixture;
 typedef struct __TestFixture*   TestFixtureRef;/*downward compatible*/
 
 struct __TestFixture {
-    char *name;
+    const char *name;
     void(*test)(void);
 };
 
@@ -54,7 +54,7 @@ typedef struct __TestCaller*    TestCallerRef;/*downward compatible*/
 
 struct __TestCaller {
     TestImplement* isa;
-    char *name;
+    const char *name;
     void(*setUp)(void);
     void(*tearDown)(void);
     int numberOfFixtuers;
diff --git a/sys/include/embUnit/TestCase.h b/sys/include/embUnit/TestCase.h
index 60e878012e..e191145400 100644
--- a/sys/include/embUnit/TestCase.h
+++ b/sys/include/embUnit/TestCase.h
@@ -44,7 +44,7 @@ typedef struct __TestCase*  TestCaseRef;/*compatible embUnit1.0*/
 
 struct __TestCase {
     TestImplement* isa;
-    char *name;
+    const char *name;
     void(*setUp)(void);
     void(*tearDown)(void);
     void(*runTest)(void);