diff --git a/test/stable_norm.cpp b/test/stable_norm.cpp
index d78496fc3..5bf249577 100644
--- a/test/stable_norm.cpp
+++ b/test/stable_norm.cpp
@@ -69,7 +69,7 @@ template<typename MatrixType> void stable_norm(const MatrixType& m)
   Index cols = m.cols();
 
   Scalar big = internal::random<Scalar>() * (std::numeric_limits<RealScalar>::max() * RealScalar(1e-4));
-  Scalar small = static_cast<RealScalar>(1)/big;
+  Scalar small = internal::random<Scalar>() * (std::numeric_limits<RealScalar>::min() * RealScalar(1e4));
 
   MatrixType  vzero = MatrixType::Zero(rows, cols),
               vrand = MatrixType::Random(rows, cols),