diff --git a/.travis.yml b/.travis.yml
index f3c6f041..cd5da4e0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,6 +33,7 @@ matrix:
         apt:
           packages:
             - g++-6
+			- libgmp-dev
           sources:
             - ubuntu-toolchain-r-test
 
@@ -42,6 +43,7 @@ matrix:
         apt:
           packages:
             - g++-6
+			- libgmp-dev
           sources:
             - ubuntu-toolchain-r-test
 
@@ -51,6 +53,7 @@ matrix:
         apt:
           packages:
             - g++-6
+			- libgmp-dev
           sources:
             - ubuntu-toolchain-r-test
 
@@ -60,6 +63,7 @@ matrix:
         apt:
           packages:
             - g++-6
+			- libgmp-dev
           sources:
             - ubuntu-toolchain-r-test
 
@@ -69,6 +73,7 @@ matrix:
         apt:
           packages:
             - g++-6
+			- libgmp-dev
           sources:
             - ubuntu-toolchain-r-test
 
@@ -78,6 +83,7 @@ matrix:
         apt:
           packages:
             - g++-6
+			- libgmp-dev
           sources:
             - ubuntu-toolchain-r-test
 
@@ -87,6 +93,7 @@ matrix:
         apt:
           packages:
             - g++-6
+			- libgmp-dev
           sources:
             - ubuntu-toolchain-r-test
 
@@ -96,6 +103,7 @@ matrix:
         apt:
           packages:
             - g++-6
+			- libgmp-dev
           sources:
             - ubuntu-toolchain-r-test
 
@@ -105,9 +113,59 @@ matrix:
         apt:
           packages:
             - g++-6
+			- libgmp-dev
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=c++03 TEST_SUITE=conversions
+      addons:
+        apt:
+          packages:
+            - g++-6
+			- libgmp-dev
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=c++11 TEST_SUITE=conversions
+      addons:
+        apt:
+          packages:
+            - g++-6
+			- libgmp-dev
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=c++14 TEST_SUITE=conversions
+      addons:
+        apt:
+          packages:
+            - g++-6
+			- libgmp-dev
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=gnu++14 TEST_SUITE=conversions
+      addons:
+        apt:
+          packages:
+            - g++-6
+			- libgmp-dev
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=c++1z TEST_SUITE=conversions
+      addons:
+        apt:
+          packages:
+            - g++-6
+			- libgmp-dev
+          sources:
+            - ubuntu-toolchain-r-test
 
 install:
   - cd ..
@@ -125,7 +183,7 @@ script:
   - |-
     echo "using $TOOLSET : : $COMPILER : <cxxflags>-std=$CXXSTD ;" > ~/user-config.jam
   - (cd libs/config/test && ../../../b2 config_info_travis_install toolset=$TOOLSET && ./config_info_travis)
-  - (cd libs/multiprecision/test && ../../../b2 toolset=$TOOLSET $TEST_SUITE)
+  - (cd libs/multiprecision/test && ../../../b2 -j3 toolset=$TOOLSET $TEST_SUITE)
 
 notifications:
   email:
diff --git a/config/has_float128.cpp b/config/has_float128.cpp
index 38a9fee2..fc69ad41 100644
--- a/config/has_float128.cpp
+++ b/config/has_float128.cpp
@@ -3,6 +3,12 @@
 //  Boost Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
+#include <boost/config.hpp>
+
+#ifndef BOOST_HAS_FLOAT128
+#error "This doesn't work unless Boost.Config enables __float128 support"
+#endif
+
 extern "C" {
 #include <quadmath.h>
 }
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index a4ddbbcc..8bce20e3 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -677,6 +677,7 @@ run test_convert_from_float128.cpp
          [ check-target-builds ../config//has_float128 : <define>HAS_FLOAT128 <source>quadmath : ] 
         ;
 
+
 #
 # This take too long to run as a regular part of the tests:
 #
@@ -980,6 +981,78 @@ run test_mixed_float.cpp no_eh_support
          [ check-target-builds ../config//has_gmp : <define>TEST_GMP <library>gmp : ]
          [ check-target-builds ../config//has_mpfr : <define>TEST_MPFR <library>mpfr <library>gmp : ] ;
 
+alias conversions :
+	test_gmp_conversions
+	test_mpfr_conversions
+	test_constants_mpf50
+	test_constants_mpfr_50
+	test_constants_cpp_dec_float
+	test_move_gmp
+	test_move_mpfr
+	test_move_tommath
+	test_move_cpp_int
+	test_test
+	test_cpp_int_lit
+	test_constexpr
+	test_nothrow_cpp_int
+	test_nothrow_cpp_rational
+	test_nothrow_cpp_bin_float
+	test_nothrow_cpp_dec_float
+	test_nothrow_float128
+	test_nothrow_gmp
+	test_nothrow_mpfr
+	test_convert_from_cpp_int
+	test_convert_from_mpz_int
+	test_convert_from_tom_int
+	test_convert_from_cpp_rational
+	test_convert_from_gmp_rational
+	test_convert_from_tom_rational
+	test_convert_from_cpp_bin_float
+	test_convert_from_cpp_dec_float
+	test_convert_from_mpf_float
+	test_convert_from_mpfr_float
+	test_convert_from_mpfi_float
+	test_convert_from_float128
+test_cpp_bin_float_io_1
+test_cpp_bin_float_io_2
+test_cpp_bin_float
+test_float_io_cpp_dec_float
+test_float_io_mpf
+test_float_io_mpfr
+test_float_io_mpfi
+test_float_io_float128
+test_float_io_intel_quad
+test_int_io_tommath
+test_int_io_mpz
+test_int_io_cpp_int
+test_cpp_int_left_shift
+test_cpp_int_1
+test_cpp_int_2
+test_cpp_int_3
+test_cpp_int_4
+test_cpp_int_5
+test_checked_cpp_int
+test_unchecked_cpp_int
+test_miller_rabin
+test_rational_io_tommath
+test_rational_io_mpz
+test_rational_io_cpp_int
+test_generic_conv
+test_rat_float_interconv_1
+test_rat_float_interconv_2
+test_rat_float_interconv_3
+test_rat_float_interconv_4
+test_rat_float_interconv_5
+test_rat_float_interconv_6
+test_rat_float_interconv_7
+test_rat_float_interconv_8
+test_cpp_int_conv
+test_cpp_int_import_export
+test_native_integer
+test_mixed_cpp_int
+test_mixed_float
+;
+
 
 compile include_test/mpfr_include_test.cpp
               : # requirements