diff --git a/main.cpp b/main.cpp
index 52a00bc..b103b91 100755
--- a/main.cpp
+++ b/main.cpp
@@ -29,7 +29,7 @@ int main(int argc, char** argv) {
     //::testing::GTEST_FLAG(filter) = "*WiFiOptimizer*";
 
 
-	::testing::GTEST_FLAG(filter) = "*FloorplanCeilings*";
+    ::testing::GTEST_FLAG(filter) = "*KullbackLeibler*";
     //::testing::GTEST_FLAG(filter) = "*Barometer*";
 	//::testing::GTEST_FLAG(filter) = "*GridWalk2RelPressure*";
 
diff --git a/math/divergence/KullbackLeibler.h b/math/divergence/KullbackLeibler.h
index 357b1c3..1ae4433 100644
--- a/math/divergence/KullbackLeibler.h
+++ b/math/divergence/KullbackLeibler.h
@@ -53,6 +53,10 @@ namespace Divergence {
                 auto log1 = std::log(det1);
                 auto log2 = std::log(det2);
 
+                //determinate shouldn't be 0!
+                Assert::isNot0(det1, "Determinat of the first Gauss is Zero! Check the Cov Matrix.");
+                Assert::isNot0(det2, "Determinat of the second Gauss is Zero! Check the Cov Matrix.");
+
                 //trace
                 Eigen::MatrixXd toTrace(norm1.getSigma().rows(),norm1.getSigma().cols());
                 toTrace = norm2.getSigmaInv() * norm1.getSigma();
@@ -74,6 +78,8 @@ namespace Divergence {
                 if(klb < 0.0){
                     Assert::doThrow("The Kullback Leibler Distance is < 0! Thats not possible");
                 }
+                Assert::isNotNaN(klb, "The Kullback Leibler Distance is NaN!");
+
                 return klb;
             }
 
diff --git a/tests/math/divergence/TestKullbackLeibler.cpp b/tests/math/divergence/TestKullbackLeibler.cpp
index 0a14f92..0a899f1 100644
--- a/tests/math/divergence/TestKullbackLeibler.cpp
+++ b/tests/math/divergence/TestKullbackLeibler.cpp
@@ -201,7 +201,7 @@ TEST(KullbackLeibler, multivariateGaussGeCov) {
 
     double kld12 = Divergence::KullbackLeibler<float>::getMultivariateGauss(norm1, norm2);
     double kld34 = Divergence::KullbackLeibler<float>::getMultivariateGauss(norm3, norm4);
-    std::cout << kld34 << " >" << kld12 << std::endl;
+    std::cout << kld34 << " > " << kld12 << std::endl;
 
     double kld12sym = Divergence::KullbackLeibler<float>::getMultivariateGaussSymmetric(norm1, norm2);
     double kld34sym = Divergence::KullbackLeibler<float>::getMultivariateGaussSymmetric(norm3, norm4);