diff --git a/CMakeLists.txt b/CMakeLists.txt
index db57172..3a1c3b3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,6 +103,8 @@
 
 add_definitions("-DEIGEN_PERMANENTLY_DISABLE_STUPID_WARNINGS")
 
+set(EIGEN_TEST_MAX_SIZE "320" CACHE STRING "Maximal matrix/vector size, default is 320")
+
 if(CMAKE_COMPILER_IS_GNUCXX)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wnon-virtual-dtor -Wno-long-long -ansi -Wundef -Wcast-align -Wchar-subscripts -Wall -W -Wpointer-arith -Wwrite-strings -Wformat-security -fexceptions -fno-check-new -fno-common -fstrict-aliasing")
   set(CMAKE_CXX_FLAGS_DEBUG "-g3")
diff --git a/cmake/EigenTesting.cmake b/cmake/EigenTesting.cmake
index 96e8793..50a2b0f 100644
--- a/cmake/EigenTesting.cmake
+++ b/cmake/EigenTesting.cmake
@@ -27,6 +27,8 @@
       ei_add_target_property(${targetname} COMPILE_FLAGS "-DEIGEN_DEBUG_ASSERTS=1")
     endif(EIGEN_DEBUG_ASSERTS)
   endif(EIGEN_NO_ASSERTION_CHECKING)
+  
+  ei_add_target_property(${targetname} COMPILE_FLAGS "-DEIGEN_TEST_MAX_SIZE=${EIGEN_TEST_MAX_SIZE}")
 
   ei_add_target_property(${targetname} COMPILE_FLAGS "-DEIGEN_TEST_FUNC=${testname}")
   
@@ -204,6 +206,8 @@
   elseif(EIGEN_TEST_NO_EXPLICIT_VECTORIZATION)
     message(STATUS "Explicit vectorization disabled (alignment kept enabled)")
   else()
+  
+  message(STATUS "Maximal matrix/vector size: ${EIGEN_TEST_MAX_SIZE}")
 
     if(EIGEN_TEST_SSE2)
       message(STATUS "SSE2:              ON")
@@ -293,3 +297,4 @@
 elseif(MSVC)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D_CRT_SECURE_NO_WARNINGS /D_SCL_SECURE_NO_WARNINGS")
 endif(CMAKE_COMPILER_IS_GNUCXX)
+
diff --git a/test/adjoint.cpp b/test/adjoint.cpp
index 11b82b4..643aca7 100644
--- a/test/adjoint.cpp
+++ b/test/adjoint.cpp
@@ -127,11 +127,11 @@
     CALL_SUBTEST_1( adjoint(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( adjoint(Matrix3d()) );
     CALL_SUBTEST_3( adjoint(Matrix4f()) );
-    CALL_SUBTEST_4( adjoint(MatrixXcf(internal::random<int>(1,50), internal::random<int>(1,50))) );
-    CALL_SUBTEST_5( adjoint(MatrixXi(internal::random<int>(1,50), internal::random<int>(1,50))) );
-    CALL_SUBTEST_6( adjoint(MatrixXf(internal::random<int>(1,50), internal::random<int>(1,50))) );
+    CALL_SUBTEST_4( adjoint(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2), internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))) );
+    CALL_SUBTEST_5( adjoint(MatrixXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_6( adjoint(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
-  // test a large matrix only once
+  // test a large static matrix only once
   CALL_SUBTEST_7( adjoint(Matrix<float, 100, 100>()) );
 
 #ifdef EIGEN_TEST_PART_4
diff --git a/test/array.cpp b/test/array.cpp
index 5b5c2ab..8bd62c4 100644
--- a/test/array.cpp
+++ b/test/array.cpp
@@ -175,7 +175,7 @@
              m2 = ArrayType::Random(rows, cols),
              m3(rows, cols);
 
-  // these these are mostly to check possible compilation issues.
+  // these tests are mostly to check possible compilation issues.
   VERIFY_IS_APPROX(m1.sin(), std::sin(m1));
   VERIFY_IS_APPROX(m1.sin(), internal::sin(m1));
   VERIFY_IS_APPROX(m1.cos(), std::cos(m1));
@@ -186,7 +186,7 @@
   VERIFY_IS_APPROX(m1.acos(), internal::acos(m1));
   VERIFY_IS_APPROX(m1.tan(), std::tan(m1));
   VERIFY_IS_APPROX(m1.tan(), internal::tan(m1));
-
+  
   VERIFY_IS_APPROX(internal::cos(m1+RealScalar(3)*m2), internal::cos((m1+RealScalar(3)*m2).eval()));
   VERIFY_IS_APPROX(std::cos(m1+RealScalar(3)*m2), std::cos((m1+RealScalar(3)*m2).eval()));
 
@@ -239,25 +239,25 @@
     CALL_SUBTEST_1( array(Array<float, 1, 1>()) );
     CALL_SUBTEST_2( array(Array22f()) );
     CALL_SUBTEST_3( array(Array44d()) );
-    CALL_SUBTEST_4( array(ArrayXXcf(3, 3)) );
-    CALL_SUBTEST_5( array(ArrayXXf(8, 12)) );
-    CALL_SUBTEST_6( array(ArrayXXi(8, 12)) );
+    CALL_SUBTEST_4( array(ArrayXXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_5( array(ArrayXXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_6( array(ArrayXXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( comparisons(Array<float, 1, 1>()) );
     CALL_SUBTEST_2( comparisons(Array22f()) );
     CALL_SUBTEST_3( comparisons(Array44d()) );
-    CALL_SUBTEST_5( comparisons(ArrayXXf(8, 12)) );
-    CALL_SUBTEST_6( comparisons(ArrayXXi(8, 12)) );
+    CALL_SUBTEST_5( comparisons(ArrayXXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_6( comparisons(ArrayXXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( array_real(Array<float, 1, 1>()) );
     CALL_SUBTEST_2( array_real(Array22f()) );
     CALL_SUBTEST_3( array_real(Array44d()) );
-    CALL_SUBTEST_5( array_real(ArrayXXf(8, 12)) );
+    CALL_SUBTEST_5( array_real(ArrayXXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
   for(int i = 0; i < g_repeat; i++) {
-    CALL_SUBTEST_4( array_complex(ArrayXXcf(3, 3)) );
+    CALL_SUBTEST_4( array_complex(ArrayXXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
 
   VERIFY((internal::is_same< internal::global_math_functions_filtering_base<int>::type, int >::value));
diff --git a/test/array_for_matrix.cpp b/test/array_for_matrix.cpp
index 45e0930..63c723e 100644
--- a/test/array_for_matrix.cpp
+++ b/test/array_for_matrix.cpp
@@ -158,28 +158,27 @@
 
 void test_array_for_matrix()
 {
-  int maxsize = 40;
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( array_for_matrix(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( array_for_matrix(Matrix2f()) );
     CALL_SUBTEST_3( array_for_matrix(Matrix4d()) );
-    CALL_SUBTEST_4( array_for_matrix(MatrixXcf(internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
-    CALL_SUBTEST_5( array_for_matrix(MatrixXf(internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
-    CALL_SUBTEST_6( array_for_matrix(MatrixXi(internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_4( array_for_matrix(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_5( array_for_matrix(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_6( array_for_matrix(MatrixXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( comparisons(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( comparisons(Matrix2f()) );
     CALL_SUBTEST_3( comparisons(Matrix4d()) );
-    CALL_SUBTEST_5( comparisons(MatrixXf(internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
-    CALL_SUBTEST_6( comparisons(MatrixXi(internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_5( comparisons(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_6( comparisons(MatrixXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( lpNorm(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( lpNorm(Vector2f()) );
     CALL_SUBTEST_7( lpNorm(Vector3d()) );
     CALL_SUBTEST_8( lpNorm(Vector4f()) );
-    CALL_SUBTEST_5( lpNorm(VectorXf(internal::random<int>(1,maxsize))) );
-    CALL_SUBTEST_4( lpNorm(VectorXcf(internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_5( lpNorm(VectorXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_4( lpNorm(VectorXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
 }
diff --git a/test/basicstuff.cpp b/test/basicstuff.cpp
index 9f39668..47ba231 100644
--- a/test/basicstuff.cpp
+++ b/test/basicstuff.cpp
@@ -215,14 +215,14 @@
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( basicStuff(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( basicStuff(Matrix4d()) );
-    CALL_SUBTEST_3( basicStuff(MatrixXcf(internal::random<int>(1,100), internal::random<int>(1,100))) );
-    CALL_SUBTEST_4( basicStuff(MatrixXi(internal::random<int>(1,100), internal::random<int>(1,100))) );
-    CALL_SUBTEST_5( basicStuff(MatrixXcd(internal::random<int>(1,100), internal::random<int>(1,100))) );
+    CALL_SUBTEST_3( basicStuff(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_4( basicStuff(MatrixXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_5( basicStuff(MatrixXcd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
     CALL_SUBTEST_6( basicStuff(Matrix<float, 100, 100>()) );
-    CALL_SUBTEST_7( basicStuff(Matrix<long double,Dynamic,Dynamic>(internal::random<int>(1,100),internal::random<int>(1,100))) );
+    CALL_SUBTEST_7( basicStuff(Matrix<long double,Dynamic,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE),internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
 
-    CALL_SUBTEST_3( basicStuffComplex(MatrixXcf(internal::random<int>(1,100), internal::random<int>(1,100))) );
-    CALL_SUBTEST_5( basicStuffComplex(MatrixXcd(internal::random<int>(1,100), internal::random<int>(1,100))) );
+    CALL_SUBTEST_3( basicStuffComplex(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_5( basicStuffComplex(MatrixXcd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
 
   CALL_SUBTEST_1(fixedSizeMatrixConstruction<unsigned char>());
diff --git a/test/cholesky.cpp b/test/cholesky.cpp
index 35fa595..b213956 100644
--- a/test/cholesky.cpp
+++ b/test/cholesky.cpp
@@ -294,9 +294,9 @@
     CALL_SUBTEST_3( cholesky(Matrix2d()) );
     CALL_SUBTEST_4( cholesky(Matrix3f()) );
     CALL_SUBTEST_5( cholesky(Matrix4d()) );
-    s = internal::random<int>(1,200);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE);
     CALL_SUBTEST_2( cholesky(MatrixXd(s,s)) );
-    s = internal::random<int>(1,100);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2);
     CALL_SUBTEST_6( cholesky_cplx(MatrixXcd(s,s)) );
   }
 
diff --git a/test/cwiseop.cpp b/test/cwiseop.cpp
index c63ace1..2ad56eb 100644
--- a/test/cwiseop.cpp
+++ b/test/cwiseop.cpp
@@ -167,9 +167,9 @@
   for(int i = 0; i < g_repeat ; i++) {
     CALL_SUBTEST_1( cwiseops(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( cwiseops(Matrix4d()) );
-    CALL_SUBTEST_3( cwiseops(MatrixXf(3, 3)) );
-    CALL_SUBTEST_4( cwiseops(MatrixXf(22, 22)) );
-    CALL_SUBTEST_5( cwiseops(MatrixXi(8, 12)) );
-    CALL_SUBTEST_6( cwiseops(MatrixXd(20, 20)) );
+    CALL_SUBTEST_3( cwiseops(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_4( cwiseops(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_5( cwiseops(MatrixXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_6( cwiseops(MatrixXd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
 }
diff --git a/test/determinant.cpp b/test/determinant.cpp
index dcf6438..eadc8c6 100644
--- a/test/determinant.cpp
+++ b/test/determinant.cpp
@@ -68,13 +68,14 @@
 
 void test_determinant()
 {
+  int s;
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( determinant(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( determinant(Matrix<double, 2, 2>()) );
     CALL_SUBTEST_3( determinant(Matrix<double, 3, 3>()) );
     CALL_SUBTEST_4( determinant(Matrix<double, 4, 4>()) );
     CALL_SUBTEST_5( determinant(Matrix<std::complex<double>, 10, 10>()) );
-    CALL_SUBTEST_6( determinant(MatrixXd(20, 20)) );
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+    CALL_SUBTEST_6( determinant(MatrixXd(s, s)) );
   }
-  CALL_SUBTEST_6( determinant(MatrixXd(200, 200)) );
 }
diff --git a/test/diagonal.cpp b/test/diagonal.cpp
index 50b341d..94a30e2 100644
--- a/test/diagonal.cpp
+++ b/test/diagonal.cpp
@@ -74,10 +74,10 @@
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( diagonal(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( diagonal(Matrix4d()) );
-    CALL_SUBTEST_2( diagonal(MatrixXcf(3, 3)) );
-    CALL_SUBTEST_2( diagonal(MatrixXi(8, 12)) );
-    CALL_SUBTEST_2( diagonal(MatrixXcd(20, 20)) );
-    CALL_SUBTEST_1( diagonal(MatrixXf(21, 19)) );
+    CALL_SUBTEST_2( diagonal(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_2( diagonal(MatrixXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_2( diagonal(MatrixXcd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_1( diagonal(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
     CALL_SUBTEST_1( diagonal(Matrix<float,Dynamic,4>(3, 4)) );
   }
 }
diff --git a/test/diagonalmatrices.cpp b/test/diagonalmatrices.cpp
index 9d6f069..d84f4e9 100644
--- a/test/diagonalmatrices.cpp
+++ b/test/diagonalmatrices.cpp
@@ -101,9 +101,9 @@
     CALL_SUBTEST_3( diagonalmatrices(Matrix<double,3,3,RowMajor>()) );
     CALL_SUBTEST_4( diagonalmatrices(Matrix4d()) );
     CALL_SUBTEST_5( diagonalmatrices(Matrix<float,4,4,RowMajor>()) );
-    CALL_SUBTEST_6( diagonalmatrices(MatrixXcf(3, 5)) );
-    CALL_SUBTEST_7( diagonalmatrices(MatrixXi(10, 8)) );
-    CALL_SUBTEST_8( diagonalmatrices(Matrix<double,Dynamic,Dynamic,RowMajor>(20, 20)) );
-    CALL_SUBTEST_9( diagonalmatrices(MatrixXf(21, 24)) );
+    CALL_SUBTEST_6( diagonalmatrices(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_7( diagonalmatrices(MatrixXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_8( diagonalmatrices(Matrix<double,Dynamic,Dynamic,RowMajor>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_9( diagonalmatrices(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
 }
diff --git a/test/eigensolver_complex.cpp b/test/eigensolver_complex.cpp
index 99e9ee8..4db0f3f 100644
--- a/test/eigensolver_complex.cpp
+++ b/test/eigensolver_complex.cpp
@@ -108,18 +108,21 @@
 
 void test_eigensolver_complex()
 {
+  int s;
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( eigensolver(Matrix4cf()) );
-    CALL_SUBTEST_2( eigensolver(MatrixXcd(14,14)) );
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+    CALL_SUBTEST_2( eigensolver(MatrixXcd(s,s)) );
     CALL_SUBTEST_3( eigensolver(Matrix<std::complex<float>, 1, 1>()) );
     CALL_SUBTEST_4( eigensolver(Matrix3f()) );
   }
 
   CALL_SUBTEST_1( eigensolver_verify_assert(Matrix4cf()) );
-  CALL_SUBTEST_2( eigensolver_verify_assert(MatrixXcd(14,14)) );
+  s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+  CALL_SUBTEST_2( eigensolver_verify_assert(MatrixXcd(s,s)) );
   CALL_SUBTEST_3( eigensolver_verify_assert(Matrix<std::complex<float>, 1, 1>()) );
   CALL_SUBTEST_4( eigensolver_verify_assert(Matrix3f()) );
 
   // Test problem size constructors
-  CALL_SUBTEST_5(ComplexEigenSolver<MatrixXf>(10));
+  CALL_SUBTEST_5(ComplexEigenSolver<MatrixXf>(s));
 }
diff --git a/test/eigensolver_generic.cpp b/test/eigensolver_generic.cpp
index 8476f02..15d5d52 100644
--- a/test/eigensolver_generic.cpp
+++ b/test/eigensolver_generic.cpp
@@ -97,9 +97,11 @@
 
 void test_eigensolver_generic()
 {
+  int s;
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( eigensolver(Matrix4f()) );
-    CALL_SUBTEST_2( eigensolver(MatrixXd(17,17)) );
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+    CALL_SUBTEST_2( eigensolver(MatrixXd(s,s)) );
 
     // some trivial but implementation-wise tricky cases
     CALL_SUBTEST_2( eigensolver(MatrixXd(1,1)) );
@@ -109,10 +111,11 @@
   }
 
   CALL_SUBTEST_1( eigensolver_verify_assert(Matrix4f()) );
-  CALL_SUBTEST_2( eigensolver_verify_assert(MatrixXd(17,17)) );
+  s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+  CALL_SUBTEST_2( eigensolver_verify_assert(MatrixXd(s,s)) );
   CALL_SUBTEST_3( eigensolver_verify_assert(Matrix<double,1,1>()) );
   CALL_SUBTEST_4( eigensolver_verify_assert(Matrix2d()) );
 
   // Test problem size constructors
-  CALL_SUBTEST_5(EigenSolver<MatrixXf>(10));
+  CALL_SUBTEST_5(EigenSolver<MatrixXf>(s));
 }
diff --git a/test/eigensolver_selfadjoint.cpp b/test/eigensolver_selfadjoint.cpp
index b85bcc2..2078b93 100644
--- a/test/eigensolver_selfadjoint.cpp
+++ b/test/eigensolver_selfadjoint.cpp
@@ -171,15 +171,20 @@
 
 void test_eigensolver_selfadjoint()
 {
+  int s;
   for(int i = 0; i < g_repeat; i++) {
     // very important to test a 3x3 matrix since we provide a special path for it
     CALL_SUBTEST_1( selfadjointeigensolver(Matrix3f()) );
     CALL_SUBTEST_2( selfadjointeigensolver(Matrix4d()) );
-    CALL_SUBTEST_3( selfadjointeigensolver(MatrixXf(10,10)) );
-    CALL_SUBTEST_4( selfadjointeigensolver(MatrixXd(19,19)) );
-    CALL_SUBTEST_5( selfadjointeigensolver(MatrixXcd(17,17)) );
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+    CALL_SUBTEST_3( selfadjointeigensolver(MatrixXf(s,s)) );
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+    CALL_SUBTEST_4( selfadjointeigensolver(MatrixXd(s,s)) );
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+    CALL_SUBTEST_5( selfadjointeigensolver(MatrixXcd(s,s)) );
     
-    CALL_SUBTEST_9( selfadjointeigensolver(Matrix<std::complex<double>,Dynamic,Dynamic,RowMajor>(17,17)) );
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+    CALL_SUBTEST_9( selfadjointeigensolver(Matrix<std::complex<double>,Dynamic,Dynamic,RowMajor>(s,s)) );
 
     // some trivial but implementation-wise tricky cases
     CALL_SUBTEST_4( selfadjointeigensolver(MatrixXd(1,1)) );
@@ -189,7 +194,8 @@
   }
 
   // Test problem size constructors
-  CALL_SUBTEST_8(SelfAdjointEigenSolver<MatrixXf>(10));
-  CALL_SUBTEST_8(Tridiagonalization<MatrixXf>(10));
+  s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4);
+  CALL_SUBTEST_8(SelfAdjointEigenSolver<MatrixXf>(s));
+  CALL_SUBTEST_8(Tridiagonalization<MatrixXf>(s));
 }
 
diff --git a/test/hessenberg.cpp b/test/hessenberg.cpp
index 51e758b..9d3dc7c 100644
--- a/test/hessenberg.cpp
+++ b/test/hessenberg.cpp
@@ -69,8 +69,8 @@
   CALL_SUBTEST_1(( hessenberg<std::complex<double>,1>() ));
   CALL_SUBTEST_2(( hessenberg<std::complex<double>,2>() ));
   CALL_SUBTEST_3(( hessenberg<std::complex<float>,4>() ));
-  CALL_SUBTEST_4(( hessenberg<float,Dynamic>(internal::random<int>(1,320)) ));
-  CALL_SUBTEST_5(( hessenberg<std::complex<double>,Dynamic>(internal::random<int>(1,320)) ));
+  CALL_SUBTEST_4(( hessenberg<float,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE)) ));
+  CALL_SUBTEST_5(( hessenberg<std::complex<double>,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE)) ));
 
   // Test problem size constructors
   CALL_SUBTEST_6(HessenbergDecomposition<MatrixXf>(10));
diff --git a/test/householder.cpp b/test/householder.cpp
index 8031025..e0aa407 100644
--- a/test/householder.cpp
+++ b/test/householder.cpp
@@ -130,9 +130,9 @@
     CALL_SUBTEST_2( householder(Matrix<float,2,3>()) );
     CALL_SUBTEST_3( householder(Matrix<double,3,5>()) );
     CALL_SUBTEST_4( householder(Matrix<float,4,4>()) );
-    CALL_SUBTEST_5( householder(MatrixXd(10,12)) );
-    CALL_SUBTEST_6( householder(MatrixXcf(16,17)) );
-    CALL_SUBTEST_7( householder(MatrixXf(25,7)) );
+    CALL_SUBTEST_5( householder(MatrixXd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE),internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_6( householder(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE),internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_7( householder(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE),internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
     CALL_SUBTEST_8( householder(Matrix<double,1,1>()) );
   }
 }
diff --git a/test/jacobi.cpp b/test/jacobi.cpp
index 6464c63..4d46222 100644
--- a/test/jacobi.cpp
+++ b/test/jacobi.cpp
@@ -82,8 +82,8 @@
     CALL_SUBTEST_3(( jacobi<Matrix4cf, float>() ));
     CALL_SUBTEST_3(( jacobi<Matrix4cf, std::complex<float> >() ));
 
-    int r = internal::random<int>(2, 20),
-        c = internal::random<int>(2, 20);
+    int r = internal::random<int>(2, internal::random<int>(1,EIGEN_TEST_MAX_SIZE)/2),
+        c = internal::random<int>(2, internal::random<int>(1,EIGEN_TEST_MAX_SIZE)/2);
     CALL_SUBTEST_4(( jacobi<MatrixXf, float>(MatrixXf(r,c)) ));
     CALL_SUBTEST_5(( jacobi<MatrixXcd, double>(MatrixXcd(r,c)) ));
     CALL_SUBTEST_5(( jacobi<MatrixXcd, std::complex<double> >(MatrixXcd(r,c)) ));
diff --git a/test/jacobisvd.cpp b/test/jacobisvd.cpp
index 907b290..92f0796 100644
--- a/test/jacobisvd.cpp
+++ b/test/jacobisvd.cpp
@@ -324,8 +324,8 @@
     CALL_SUBTEST_7( jacobisvd_inf_nan<MatrixXf>() );
   }
 
-  CALL_SUBTEST_7(( jacobisvd<MatrixXf>(MatrixXf(internal::random<int>(100, 150), internal::random<int>(100, 150))) ));
-  CALL_SUBTEST_8(( jacobisvd<MatrixXcd>(MatrixXcd(internal::random<int>(80, 100), internal::random<int>(80, 100))) ));
+  CALL_SUBTEST_7(( jacobisvd<MatrixXf>(MatrixXf(internal::random<int>(EIGEN_TEST_MAX_SIZE/4, EIGEN_TEST_MAX_SIZE/2), internal::random<int>(EIGEN_TEST_MAX_SIZE/4, EIGEN_TEST_MAX_SIZE/2))) ));
+  CALL_SUBTEST_8(( jacobisvd<MatrixXcd>(MatrixXcd(internal::random<int>(EIGEN_TEST_MAX_SIZE/4, EIGEN_TEST_MAX_SIZE/3), internal::random<int>(EIGEN_TEST_MAX_SIZE/4, EIGEN_TEST_MAX_SIZE/3))) ));
 
   // test matrixbase method
   CALL_SUBTEST_1(( jacobisvd_method<Matrix2cd>() ));
diff --git a/test/linearstructure.cpp b/test/linearstructure.cpp
index 3121027..c638c07 100644
--- a/test/linearstructure.cpp
+++ b/test/linearstructure.cpp
@@ -90,10 +90,10 @@
     CALL_SUBTEST_2( linearStructure(Matrix2f()) );
     CALL_SUBTEST_3( linearStructure(Vector3d()) );
     CALL_SUBTEST_4( linearStructure(Matrix4d()) );
-    CALL_SUBTEST_5( linearStructure(MatrixXcf(3, 3)) );
-    CALL_SUBTEST_6( linearStructure(MatrixXf(8, 12)) );
-    CALL_SUBTEST_7( linearStructure(MatrixXi(8, 12)) );
-    CALL_SUBTEST_8( linearStructure(MatrixXcd(20, 20)) );
-    CALL_SUBTEST_9( linearStructure(ArrayXXf(12, 8)) );
+    CALL_SUBTEST_5( linearStructure(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2), internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))) );
+    CALL_SUBTEST_6( linearStructure(MatrixXf (internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_7( linearStructure(MatrixXi (internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_8( linearStructure(MatrixXcd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2), internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))) );
+    CALL_SUBTEST_9( linearStructure(ArrayXXf (internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
 }
diff --git a/test/lu.cpp b/test/lu.cpp
index eac7c1e..4651240 100644
--- a/test/lu.cpp
+++ b/test/lu.cpp
@@ -37,7 +37,7 @@
   Index rows, cols, cols2;
   if(MatrixType::RowsAtCompileTime==Dynamic)
   {
-    rows = internal::random<Index>(2,200);
+    rows = internal::random<Index>(2,EIGEN_TEST_MAX_SIZE);
   }
   else
   {
@@ -45,8 +45,8 @@
   }
   if(MatrixType::ColsAtCompileTime==Dynamic)
   {
-    cols = internal::random<Index>(2,200);
-    cols2 = internal::random<int>(2,200);
+    cols = internal::random<Index>(2,EIGEN_TEST_MAX_SIZE);
+    cols2 = internal::random<int>(2,EIGEN_TEST_MAX_SIZE);
   }
   else
   {
@@ -117,7 +117,7 @@
   */
   typedef typename MatrixType::Scalar Scalar;
   typedef typename NumTraits<typename MatrixType::Scalar>::Real RealScalar;
-  int size = internal::random<int>(1,200);
+  int size = internal::random<int>(1,EIGEN_TEST_MAX_SIZE);
 
   MatrixType m1(size, size), m2(size, size), m3(size, size);
   FullPivLU<MatrixType> lu;
diff --git a/test/mixingtypes.cpp b/test/mixingtypes.cpp
index 8afb733..6819f93 100644
--- a/test/mixingtypes.cpp
+++ b/test/mixingtypes.cpp
@@ -143,5 +143,5 @@
 {
   CALL_SUBTEST_1(mixingtypes<3>());
   CALL_SUBTEST_2(mixingtypes<4>());
-  CALL_SUBTEST_3(mixingtypes<Dynamic>(internal::random<int>(1,310)));
+  CALL_SUBTEST_3(mixingtypes<Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE)));
 }
diff --git a/test/product_extra.cpp b/test/product_extra.cpp
index 60f00a4..25a9974 100644
--- a/test/product_extra.cpp
+++ b/test/product_extra.cpp
@@ -143,10 +143,10 @@
 void test_product_extra()
 {
   for(int i = 0; i < g_repeat; i++) {
-    CALL_SUBTEST_1( product_extra(MatrixXf(internal::random<int>(1,320), internal::random<int>(1,320))) );
-    CALL_SUBTEST_2( product_extra(MatrixXd(internal::random<int>(1,320), internal::random<int>(1,320))) );
-    CALL_SUBTEST_3( product_extra(MatrixXcf(internal::random<int>(1,150), internal::random<int>(1,150))) );
-    CALL_SUBTEST_4( product_extra(MatrixXcd(internal::random<int>(1,150), internal::random<int>(1,150))) );
+    CALL_SUBTEST_1( product_extra(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_2( product_extra(MatrixXd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_3( product_extra(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2), internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))) );
+    CALL_SUBTEST_4( product_extra(MatrixXcd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2), internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))) );
     CALL_SUBTEST_5( zero_sized_objects() );
   }
 }
diff --git a/test/product_large.cpp b/test/product_large.cpp
index 8ed9370..6f7a91b 100644
--- a/test/product_large.cpp
+++ b/test/product_large.cpp
@@ -27,11 +27,11 @@
 void test_product_large()
 {
   for(int i = 0; i < g_repeat; i++) {
-    CALL_SUBTEST_1( product(MatrixXf(internal::random<int>(1,320), internal::random<int>(1,320))) );
-    CALL_SUBTEST_2( product(MatrixXd(internal::random<int>(1,320), internal::random<int>(1,320))) );
-    CALL_SUBTEST_3( product(MatrixXi(internal::random<int>(1,320), internal::random<int>(1,320))) );
-    CALL_SUBTEST_4( product(MatrixXcf(internal::random<int>(1,150), internal::random<int>(1,150))) );
-    CALL_SUBTEST_5( product(Matrix<float,Dynamic,Dynamic,RowMajor>(internal::random<int>(1,320), internal::random<int>(1,320))) );
+    CALL_SUBTEST_1( product(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_2( product(MatrixXd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_3( product(MatrixXi(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+    CALL_SUBTEST_4( product(MatrixXcf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2), internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))) );
+    CALL_SUBTEST_5( product(Matrix<float,Dynamic,Dynamic,RowMajor>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE), internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
   }
 
 #if defined EIGEN_TEST_PART_6
diff --git a/test/product_mmtr.cpp b/test/product_mmtr.cpp
index 1048a89..c6ceb48 100644
--- a/test/product_mmtr.cpp
+++ b/test/product_mmtr.cpp
@@ -72,9 +72,9 @@
 {
   for(int i = 0; i < g_repeat ; i++)
   {
-    CALL_SUBTEST_1((mmtr<float>(internal::random<int>(1,320))));
-    CALL_SUBTEST_2((mmtr<double>(internal::random<int>(1,320))));
-    CALL_SUBTEST_3((mmtr<std::complex<float> >(internal::random<int>(1,200))));
-    CALL_SUBTEST_4((mmtr<std::complex<double> >(internal::random<int>(1,200))));
+    CALL_SUBTEST_1((mmtr<float>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE))));
+    CALL_SUBTEST_2((mmtr<double>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE))));
+    CALL_SUBTEST_3((mmtr<std::complex<float> >(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))));
+    CALL_SUBTEST_4((mmtr<std::complex<double> >(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))));
   }
 }
diff --git a/test/product_notemporary.cpp b/test/product_notemporary.cpp
index 980e2bb..1a9dc14 100644
--- a/test/product_notemporary.cpp
+++ b/test/product_notemporary.cpp
@@ -141,13 +141,13 @@
 {
   int s;
   for(int i = 0; i < g_repeat; i++) {
-    s = internal::random<int>(16,320);
+    s = internal::random<int>(16,EIGEN_TEST_MAX_SIZE);
     CALL_SUBTEST_1( product_notemporary(MatrixXf(s, s)) );
-    s = internal::random<int>(16,320);
+    s = internal::random<int>(16,EIGEN_TEST_MAX_SIZE);
     CALL_SUBTEST_2( product_notemporary(MatrixXd(s, s)) );
-    s = internal::random<int>(16,120);
+    s = internal::random<int>(16,EIGEN_TEST_MAX_SIZE/2);
     CALL_SUBTEST_3( product_notemporary(MatrixXcf(s,s)) );
-    s = internal::random<int>(16,120);
+    s = internal::random<int>(16,EIGEN_TEST_MAX_SIZE/2);
     CALL_SUBTEST_4( product_notemporary(MatrixXcd(s,s)) );
   }
 }
diff --git a/test/product_selfadjoint.cpp b/test/product_selfadjoint.cpp
index ca84969..91ac7a9 100644
--- a/test/product_selfadjoint.cpp
+++ b/test/product_selfadjoint.cpp
@@ -83,13 +83,13 @@
     CALL_SUBTEST_1( product_selfadjoint(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( product_selfadjoint(Matrix<float, 2, 2>()) );
     CALL_SUBTEST_3( product_selfadjoint(Matrix3d()) );
-    s = internal::random<int>(1,150);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2);
     CALL_SUBTEST_4( product_selfadjoint(MatrixXcf(s, s)) );
-    s = internal::random<int>(1,150);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2);
     CALL_SUBTEST_5( product_selfadjoint(MatrixXcd(s,s)) );
-    s = internal::random<int>(1,320);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE);
     CALL_SUBTEST_6( product_selfadjoint(MatrixXd(s,s)) );
-    s = internal::random<int>(1,320);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE);
     CALL_SUBTEST_7( product_selfadjoint(Matrix<float,Dynamic,Dynamic,RowMajor>(s,s)) );
   }
 }
diff --git a/test/product_symm.cpp b/test/product_symm.cpp
index 21c2f60..4585c3b 100644
--- a/test/product_symm.cpp
+++ b/test/product_symm.cpp
@@ -98,14 +98,14 @@
 {
   for(int i = 0; i < g_repeat ; i++)
   {
-    CALL_SUBTEST_1(( symm<float,Dynamic,Dynamic>(internal::random<int>(1,320),internal::random<int>(1,320)) ));
-    CALL_SUBTEST_2(( symm<double,Dynamic,Dynamic>(internal::random<int>(1,320),internal::random<int>(1,320)) ));
-    CALL_SUBTEST_3(( symm<std::complex<float>,Dynamic,Dynamic>(internal::random<int>(1,200),internal::random<int>(1,200)) ));
-    CALL_SUBTEST_4(( symm<std::complex<double>,Dynamic,Dynamic>(internal::random<int>(1,200),internal::random<int>(1,200)) ));
+    CALL_SUBTEST_1(( symm<float,Dynamic,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE),internal::random<int>(1,EIGEN_TEST_MAX_SIZE)) ));
+    CALL_SUBTEST_2(( symm<double,Dynamic,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE),internal::random<int>(1,EIGEN_TEST_MAX_SIZE)) ));
+    CALL_SUBTEST_3(( symm<std::complex<float>,Dynamic,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2),internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2)) ));
+    CALL_SUBTEST_4(( symm<std::complex<double>,Dynamic,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2),internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2)) ));
 
-    CALL_SUBTEST_5(( symm<float,Dynamic,1>(internal::random<int>(1,320)) ));
-    CALL_SUBTEST_6(( symm<double,Dynamic,1>(internal::random<int>(1,320)) ));
-    CALL_SUBTEST_7(( symm<std::complex<float>,Dynamic,1>(internal::random<int>(1,320)) ));
-    CALL_SUBTEST_8(( symm<std::complex<double>,Dynamic,1>(internal::random<int>(1,320)) ));
+    CALL_SUBTEST_5(( symm<float,Dynamic,1>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE)) ));
+    CALL_SUBTEST_6(( symm<double,Dynamic,1>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE)) ));
+    CALL_SUBTEST_7(( symm<std::complex<float>,Dynamic,1>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE)) ));
+    CALL_SUBTEST_8(( symm<std::complex<double>,Dynamic,1>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE)) ));
   }
 }
diff --git a/test/product_syrk.cpp b/test/product_syrk.cpp
index 553410b..71285ac 100644
--- a/test/product_syrk.cpp
+++ b/test/product_syrk.cpp
@@ -101,13 +101,13 @@
   for(int i = 0; i < g_repeat ; i++)
   {
     int s;
-    s = internal::random<int>(1,320);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE);
     CALL_SUBTEST_1( syrk(MatrixXf(s, s)) );
-    s = internal::random<int>(1,320);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE);
     CALL_SUBTEST_2( syrk(MatrixXd(s, s)) );
-    s = internal::random<int>(1,200);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2);
     CALL_SUBTEST_3( syrk(MatrixXcf(s, s)) );
-    s = internal::random<int>(1,200);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2);
     CALL_SUBTEST_4( syrk(MatrixXcd(s, s)) );
   }
 }
diff --git a/test/product_trmm.cpp b/test/product_trmm.cpp
index 4220fff..dab05d8 100644
--- a/test/product_trmm.cpp
+++ b/test/product_trmm.cpp
@@ -25,7 +25,9 @@
 #include "main.h"
 
 template<typename Scalar, int Mode, int TriOrder, int OtherOrder, int ResOrder, int OtherCols>
-void trmm(int rows=internal::random<int>(1,320), int cols=internal::random<int>(1,320), int otherCols = OtherCols==Dynamic?internal::random<int>(1,320):OtherCols)
+void trmm(int rows=internal::random<int>(1,EIGEN_TEST_MAX_SIZE),
+          int cols=internal::random<int>(1,EIGEN_TEST_MAX_SIZE),
+          int otherCols = OtherCols==Dynamic?internal::random<int>(1,EIGEN_TEST_MAX_SIZE):OtherCols)
 {
   typedef typename NumTraits<Scalar>::Real RealScalar;
 
@@ -75,13 +77,13 @@
 }
 
 template<typename Scalar, int Mode, int TriOrder>
-void trmv(int rows=internal::random<int>(1,320), int cols=internal::random<int>(1,320))
+void trmv(int rows=internal::random<int>(1,EIGEN_TEST_MAX_SIZE), int cols=internal::random<int>(1,EIGEN_TEST_MAX_SIZE))
 {
   trmm<Scalar,Mode,TriOrder,ColMajor,ColMajor,1>(rows,cols,1);
 }
 
 template<typename Scalar, int Mode, int TriOrder, int OtherOrder, int ResOrder>
-void trmm(int rows=internal::random<int>(1,320), int cols=internal::random<int>(1,320), int otherCols = internal::random<int>(1,320))
+void trmm(int rows=internal::random<int>(1,EIGEN_TEST_MAX_SIZE), int cols=internal::random<int>(1,EIGEN_TEST_MAX_SIZE), int otherCols = internal::random<int>(1,EIGEN_TEST_MAX_SIZE))
 {
   trmm<Scalar,Mode,TriOrder,OtherOrder,ResOrder,Dynamic>(rows,cols,otherCols);
 }
@@ -96,7 +98,7 @@
   EIGEN_CAT(CALL_SUBTEST_,NB)((trmm<SCALAR, MODE, RowMajor,RowMajor,ColMajor>()));  \
   EIGEN_CAT(CALL_SUBTEST_,NB)((trmm<SCALAR, MODE, RowMajor,RowMajor,RowMajor>()));  \
   \
-  EIGEN_CAT(CALL_SUBTEST_1,NB)((trmv<SCALAR, MODE, ColMajor>()));                    \
+  EIGEN_CAT(CALL_SUBTEST_1,NB)((trmv<SCALAR, MODE, ColMajor>()));                   \
   EIGEN_CAT(CALL_SUBTEST_1,NB)((trmv<SCALAR, MODE, RowMajor>()));
 
   
diff --git a/test/product_trmv.cpp b/test/product_trmv.cpp
index cfb7355..76484dc 100644
--- a/test/product_trmv.cpp
+++ b/test/product_trmv.cpp
@@ -93,11 +93,11 @@
     CALL_SUBTEST_1( trmv(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( trmv(Matrix<float, 2, 2>()) );
     CALL_SUBTEST_3( trmv(Matrix3d()) );
-    s = internal::random<int>(1,200);
-    CALL_SUBTEST_4( trmv(MatrixXcf(s,s)) );
-    s = internal::random<int>(1,200);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2);
+    CALL_SUBTEST_4( trmv(MatrixXcf(s,internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))) );
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2);
     CALL_SUBTEST_5( trmv(MatrixXcd(s,s)) );
-    s = internal::random<int>(1,320);
+    s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE);
     CALL_SUBTEST_6( trmv(Matrix<float,Dynamic,Dynamic,RowMajor>(s, s)) );
   }
 }
diff --git a/test/product_trsolve.cpp b/test/product_trsolve.cpp
index c207cc5..20380ac 100644
--- a/test/product_trsolve.cpp
+++ b/test/product_trsolve.cpp
@@ -93,14 +93,14 @@
   for(int i = 0; i < g_repeat ; i++)
   {
     // matrices
-    CALL_SUBTEST_1((trsolve<float,Dynamic,Dynamic>(internal::random<int>(1,320),internal::random<int>(1,320))));
-    CALL_SUBTEST_2((trsolve<double,Dynamic,Dynamic>(internal::random<int>(1,320),internal::random<int>(1,320))));
-    CALL_SUBTEST_3((trsolve<std::complex<float>,Dynamic,Dynamic>(internal::random<int>(1,200),internal::random<int>(1,200))));
-    CALL_SUBTEST_4((trsolve<std::complex<double>,Dynamic,Dynamic>(internal::random<int>(1,200),internal::random<int>(1,200))));
+    CALL_SUBTEST_1((trsolve<float,Dynamic,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE),internal::random<int>(1,EIGEN_TEST_MAX_SIZE))));
+    CALL_SUBTEST_2((trsolve<double,Dynamic,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE),internal::random<int>(1,EIGEN_TEST_MAX_SIZE))));
+    CALL_SUBTEST_3((trsolve<std::complex<float>,Dynamic,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2),internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))));
+    CALL_SUBTEST_4((trsolve<std::complex<double>,Dynamic,Dynamic>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2),internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))));
 
     // vectors
-    CALL_SUBTEST_1((trsolve<float,Dynamic,1>(internal::random<int>(1,320))));
-    CALL_SUBTEST_5((trsolve<std::complex<double>,Dynamic,1>(internal::random<int>(1,320))));
+    CALL_SUBTEST_1((trsolve<float,Dynamic,1>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE))));
+    CALL_SUBTEST_5((trsolve<std::complex<double>,Dynamic,1>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE))));
     CALL_SUBTEST_6((trsolve<float,1,1>()));
     CALL_SUBTEST_7((trsolve<float,1,2>()));
     CALL_SUBTEST_8((trsolve<std::complex<float>,4,1>()));
diff --git a/test/qr.cpp b/test/qr.cpp
index 7e9ac9d..6005c0e 100644
--- a/test/qr.cpp
+++ b/test/qr.cpp
@@ -114,8 +114,8 @@
 void test_qr()
 {
   for(int i = 0; i < g_repeat; i++) {
-   CALL_SUBTEST_1( qr(MatrixXf(internal::random<int>(1,200),internal::random<int>(1,200))) );
-   CALL_SUBTEST_2( qr(MatrixXcd(internal::random<int>(1,200),internal::random<int>(1,200))) );
+   CALL_SUBTEST_1( qr(MatrixXf(internal::random<int>(1,EIGEN_TEST_MAX_SIZE),internal::random<int>(1,EIGEN_TEST_MAX_SIZE))) );
+   CALL_SUBTEST_2( qr(MatrixXcd(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2),internal::random<int>(1,EIGEN_TEST_MAX_SIZE/2))) );
    CALL_SUBTEST_3(( qr_fixedsize<Matrix<float,3,4>, 2 >() ));
    CALL_SUBTEST_4(( qr_fixedsize<Matrix<double,6,2>, 4 >() ));
    CALL_SUBTEST_5(( qr_fixedsize<Matrix<double,2,5>, 7 >() ));
diff --git a/test/qr_colpivoting.cpp b/test/qr_colpivoting.cpp
index ddfb1ba..dd1f89b 100644
--- a/test/qr_colpivoting.cpp
+++ b/test/qr_colpivoting.cpp
@@ -30,7 +30,7 @@
 {
   typedef typename MatrixType::Index Index;
 
-  Index rows = internal::random<Index>(2,200), cols = internal::random<Index>(2,200), cols2 = internal::random<Index>(2,200);
+  Index rows = internal::random<Index>(2,EIGEN_TEST_MAX_SIZE), cols = internal::random<Index>(2,EIGEN_TEST_MAX_SIZE), cols2 = internal::random<Index>(2,EIGEN_TEST_MAX_SIZE);
   Index rank = internal::random<Index>(1, std::min(rows, cols)-1);
 
   typedef typename MatrixType::Scalar Scalar;
diff --git a/test/redux.cpp b/test/redux.cpp
index 57b4603..3e16797 100644
--- a/test/redux.cpp
+++ b/test/redux.cpp
@@ -139,6 +139,9 @@
 
 void test_redux()
 {
+  // the max size cannot be too large, otherwise reduxion operations obviously generate large errors.
+  int maxsize = std::min(100,EIGEN_TEST_MAX_SIZE);
+  EIGEN_UNUSED_VARIABLE(maxsize);
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_1( matrixRedux(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_1( matrixRedux(Array<float, 1, 1>()) );
@@ -146,19 +149,19 @@
     CALL_SUBTEST_2( matrixRedux(Array2f()) );
     CALL_SUBTEST_3( matrixRedux(Matrix4d()) );
     CALL_SUBTEST_3( matrixRedux(Array4d()) );
-    CALL_SUBTEST_4( matrixRedux(MatrixXcf(3, 3)) );
-    CALL_SUBTEST_4( matrixRedux(ArrayXXcf(3, 3)) );
-    CALL_SUBTEST_5( matrixRedux(MatrixXd(8, 12)) );
-    CALL_SUBTEST_5( matrixRedux(ArrayXXd(8, 12)) );
-    CALL_SUBTEST_6( matrixRedux(MatrixXi(8, 12)) );
-    CALL_SUBTEST_6( matrixRedux(ArrayXXi(8, 12)) );
+    CALL_SUBTEST_4( matrixRedux(MatrixXcf(internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_4( matrixRedux(ArrayXXcf(internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_5( matrixRedux(MatrixXd (internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_5( matrixRedux(ArrayXXd (internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_6( matrixRedux(MatrixXi (internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_6( matrixRedux(ArrayXXi (internal::random<int>(1,maxsize), internal::random<int>(1,maxsize))) );
   }
   for(int i = 0; i < g_repeat; i++) {
     CALL_SUBTEST_7( vectorRedux(Vector4f()) );
     CALL_SUBTEST_7( vectorRedux(Array4f()) );
-    CALL_SUBTEST_5( vectorRedux(VectorXd(10)) );
-    CALL_SUBTEST_5( vectorRedux(ArrayXd(10)) );
-    CALL_SUBTEST_8( vectorRedux(VectorXf(33)) );
-    CALL_SUBTEST_8( vectorRedux(ArrayXf(33)) );
+    CALL_SUBTEST_5( vectorRedux(VectorXd(internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_5( vectorRedux(ArrayXd(internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_8( vectorRedux(VectorXf(internal::random<int>(1,maxsize))) );
+    CALL_SUBTEST_8( vectorRedux(ArrayXf(internal::random<int>(1,maxsize))) );
   }
 }
diff --git a/test/schur_complex.cpp b/test/schur_complex.cpp
index a2a89fd..15532e2 100644
--- a/test/schur_complex.cpp
+++ b/test/schur_complex.cpp
@@ -80,7 +80,7 @@
 void test_schur_complex()
 {
   CALL_SUBTEST_1(( schur<Matrix4cd>() ));
-  CALL_SUBTEST_2(( schur<MatrixXcf>(internal::random<int>(1,50)) ));
+  CALL_SUBTEST_2(( schur<MatrixXcf>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4)) ));
   CALL_SUBTEST_3(( schur<Matrix<std::complex<float>, 1, 1> >() ));
   CALL_SUBTEST_4(( schur<Matrix<float, 3, 3, Eigen::RowMajor> >() ));
 
diff --git a/test/schur_real.cpp b/test/schur_real.cpp
index 58717fa..ba0947d 100644
--- a/test/schur_real.cpp
+++ b/test/schur_real.cpp
@@ -99,7 +99,7 @@
 void test_schur_real()
 {
   CALL_SUBTEST_1(( schur<Matrix4f>() ));
-  CALL_SUBTEST_2(( schur<MatrixXd>(internal::random<int>(1,50)) ));
+  CALL_SUBTEST_2(( schur<MatrixXd>(internal::random<int>(1,EIGEN_TEST_MAX_SIZE/4)) ));
   CALL_SUBTEST_3(( schur<Matrix<float, 1, 1> >() ));
   CALL_SUBTEST_4(( schur<Matrix<double, 3, 3, Eigen::RowMajor> >() ));
 
diff --git a/test/selfadjoint.cpp b/test/selfadjoint.cpp
index 622045f..364478b 100644
--- a/test/selfadjoint.cpp
+++ b/test/selfadjoint.cpp
@@ -61,7 +61,7 @@
 {
   for(int i = 0; i < g_repeat ; i++)
   {
-    int s = internal::random<int>(1,20); EIGEN_UNUSED_VARIABLE(s);
+    int s = internal::random<int>(1,EIGEN_TEST_MAX_SIZE); EIGEN_UNUSED_VARIABLE(s);
 
     CALL_SUBTEST_1( selfadjoint(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( selfadjoint(Matrix<float, 2, 2>()) );
diff --git a/test/triangular.cpp b/test/triangular.cpp
index 69decb7..7d49f6f 100644
--- a/test/triangular.cpp
+++ b/test/triangular.cpp
@@ -244,8 +244,8 @@
 {
   for(int i = 0; i < g_repeat ; i++)
   {
-    int r = internal::random<int>(2,20); EIGEN_UNUSED_VARIABLE(r);
-    int c = internal::random<int>(2,20); EIGEN_UNUSED_VARIABLE(c);
+    int r = internal::random<int>(2,EIGEN_TEST_MAX_SIZE); EIGEN_UNUSED_VARIABLE(r);
+    int c = internal::random<int>(2,EIGEN_TEST_MAX_SIZE); EIGEN_UNUSED_VARIABLE(c);
 
     CALL_SUBTEST_1( triangular_square(Matrix<float, 1, 1>()) );
     CALL_SUBTEST_2( triangular_square(Matrix<float, 2, 2>()) );