diff --git a/tests/run_test_matlab.m b/tests/run_test_matlab.m
index dfb549549..2602df7e9 100644
--- a/tests/run_test_matlab.m
+++ b/tests/run_test_matlab.m
@@ -55,6 +55,7 @@ while ~isempty(name)
         printMakeCheckMatlabErrMsg(modfile, exception);
         clear exception
     end
+    close all
     delete('wsMat.mat')
 
     cd(top_test_dir);