diff --git a/cppad.spec b/cppad.spec
index 5fadadd..6feb782 100644
--- a/cppad.spec
+++ b/cppad.spec
@@ -96,6 +96,27 @@ sed -i.bak CppAD-%{version}/cmake/set_compile_flags.cmake \
 sed -i.bak CppAD-%{version}/test_more/debug_rel/CMakeLists.txt \
     -e 's|-DCPPAD_DEBUG_AND_RELEASE||'
 # ----------------------------------------------------------------------------
+# Print machine epsilon before any other testing
+cat << EOF > temp.cpp
+# include <iostream>
+# include <limits>
+int main(void)
+{   float float_eps = std::numeric_limits<float>::epsilon();
+    std::cout << "float_eps = " << float_eps << "\n";
+    //
+    float double_eps = std::numeric_limits<double>::epsilon();
+    std::cout << "double_eps = " << double_eps << "\n";
+    //
+    float long_double_eps = std::numeric_limits<long double>::epsilon();
+    std::cout << "long_double_eps = " << long_double_eps << "\n";
+    //
+    return 0;
+}
+EOF
+g++ -std=c++11 temp.cpp -o temp
+./temp > temp.out
+cat temp.out
+# ----------------------------------------------------------------------------
 # Patch to fix example/utility/to_string.cpp
 # This will no longer be necessary once the upstread source > 20220000.1
 cat << EOF > to_string.patch
@@ -241,6 +262,7 @@ make %{?_smp_mflags} check
 %changelog
 * Tue Feb 01 2022  Brad Bell <bradbell at seanet dot com> - 20220000.1-1
 - Modify to_string.cpp patch to print out more information on failure.
+- Add simple program to print machine epsilon before any other testing.
 
 * Mon Jan 31 2022  Brad Bell <bradbell at seanet dot com> - 20220000.1-1
 - Fix following long standing typos in cmake command: