diff --git a/.travis.yml b/.travis.yml
index 55d027c767..0427c78579 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ script:
   - cmake -DCOVERALLS=ON -DCOVERALLS_UPLOAD=ON -DCMAKE_BUILD_TYPE=Debug ..
   - make
   - make check_format
+  - ctest
   - ctest -V
   - make coveralls
 env:
diff --git a/test/filter.cpp b/test/filter.cpp
index 8e723e8c63..687c8fae61 100644
--- a/test/filter.cpp
+++ b/test/filter.cpp
@@ -21,7 +21,7 @@ int main()
     float beta = 0;
     kalman_correct<float, 6, 5>(P, C, R, r, dx, beta);
 
-    dx.print();
+    dx.T().print();
     printf("beta: %g\n", beta);
 
     float data_check[] = {0.5,1,1.5,2,2.5,0};