diff --git a/eo/test/t-eoCMAES.cpp b/eo/test/t-eoCMAES.cpp
index 0c795de7..912d5128 100644
--- a/eo/test/t-eoCMAES.cpp
+++ b/eo/test/t-eoCMAES.cpp
@@ -58,7 +58,7 @@ int main(int argc, char* argv[]) {
     // make sure we have a dimensionality parameter (for testing)
     char** rargv = new char*[argc+1];
     rargv[0] = argv[0];
-    rargv[1] = "-N10";
+    rargv[1] = (char*)"-N10";
     for (int i = 2; i < argc; ++i) {
 	rargv[i] = argv[i-1];
     }
diff --git a/eo/test/t-eoGenOp.cpp b/eo/test/t-eoGenOp.cpp
index af8f5e69..910474f9 100644
--- a/eo/test/t-eoGenOp.cpp
+++ b/eo/test/t-eoGenOp.cpp
@@ -206,8 +206,8 @@ int the_main(int argc, char **argv)
       }
 
   ////////////////////////////////// define operators
-  monop mon("mon1");
-  monop clone("clone");
+  monop mon((char*)"mon1");
+  monop clone((char*)"clone");
   binop bin;
   quadop quad;
   quadClone quadclone;
diff --git a/eo/test/t-eoSecondsElapsedContinue.cpp b/eo/test/t-eoSecondsElapsedContinue.cpp
index 80b1391b..e6e59a61 100644
--- a/eo/test/t-eoSecondsElapsedContinue.cpp
+++ b/eo/test/t-eoSecondsElapsedContinue.cpp
@@ -11,10 +11,9 @@
 class Dummy : public EO<double> {};
 
 int main() {
-    
+
     eoPop<Dummy> pop;
 
-    int s = 1;
     eoSecondsElapsedContinue<Dummy> cnt(1);
 
 	time_t start_time = time(0);