diff --git a/CMakeLists_files.cmake b/CMakeLists_files.cmake
index cb451ea7b..bb86b3c49 100644
--- a/CMakeLists_files.cmake
+++ b/CMakeLists_files.cmake
@@ -44,6 +44,7 @@ list (APPEND TEST_SOURCE_FILES
 	tests/test_boprops_ad.cpp
 	tests/test_span.cpp
 	tests/test_syntax.cpp
+	tests/test_scalar_mult.cpp
 	)
 
 list (APPEND TEST_DATA_FILES
diff --git a/tests/test_scalar_mult.cpp b/tests/test_scalar_mult.cpp
new file mode 100644
index 000000000..9b131800c
--- /dev/null
+++ b/tests/test_scalar_mult.cpp
@@ -0,0 +1,53 @@
+#include <config.h>
+
+#if HAVE_DYNAMIC_BOOST_TEST
+#define BOOST_TEST_DYN_LINK
+#endif
+
+#define BOOST_TEST_MODULE ScalarMultTest
+
+#include <opm/autodiff/AutoDiff.hpp>
+
+#include <cmath>
+#include <boost/test/unit_test.hpp>
+
+#include <iostream>
+
+BOOST_AUTO_TEST_CASE(ScalarMultiplication)
+{
+
+
+    std::cout << "er her" << std::endl;
+    
+
+    typedef AutoDiff::Forward<double> AdFW;
+
+    const double atol = 1.0e-14;
+
+    AdFW a = AdFW::variable(0.0);
+    AdFW b = AdFW::variable(1.0);
+
+    AdFW two_a = a + a;
+    BOOST_CHECK_CLOSE(two_a.val(), 2*a.val(), atol);
+    BOOST_CHECK_CLOSE(two_a.der(), 2*a.der(), atol);
+
+    double av = a.val();
+    double ad = a.der();
+    a += b;
+    BOOST_CHECK_CLOSE(a.val(), av + b.val(), atol);
+    BOOST_CHECK_CLOSE(a.der(), ad + b.der(), atol);
+
+    av = a.val();
+    ad = a.der();
+    a += 1;
+    BOOST_CHECK_CLOSE(a.val(), av + 1, atol);
+    BOOST_CHECK_CLOSE(a.der(), ad    , atol);
+
+    AdFW bpo = b + 1;           // b plus one
+    BOOST_CHECK_CLOSE(bpo.val(), b.val() + 1, atol);
+    BOOST_CHECK_CLOSE(bpo.der(), b.der()    , atol);
+
+    AdFW opb = 1 + b;           // one plus b
+    BOOST_CHECK_CLOSE(opb.val(), b.val() + 1, atol);
+    BOOST_CHECK_CLOSE(opb.der(), b.der()    , atol);
+}