diff --git a/.travis.yml b/.travis.yml
index 78a7fa8e..1d1f3c73 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -97,8 +97,8 @@ before_install:
 
 script:
     # `--coverage` flags required to generate coverage info for Coveralls
-    - python $BOOST/libs/$PROJECT_TO_TEST/filter_section_warning.py ../../../b2 with-valgrind address-model=64 architecture=x86 testing.launcher=valgrind valgrind=on toolset=$TOOLSET cxxflags="--coverage -DBOOST_TRAVISCI_BUILD -std=$CXX_STANDARD" linkflags=$LDFLAGS -sBOOST_BUILD_PATH=.
-    - python $BOOST/libs/$PROJECT_TO_TEST/filter_section_warning.py ../../../b2 without-valgrind address-model=64 architecture=x86 toolset=$TOOLSET cxxflags="--coverage -DBOOST_TRAVISCI_BUILD -std=$CXX_STANDARD" linkflags=$LDFLAGS -sBOOST_BUILD_PATH=.
+    - ../../../b2 with-valgrind address-model=64 architecture=x86 testing.launcher=valgrind valgrind=on toolset=$TOOLSET cxxflags="--coverage -DBOOST_TRAVISCI_BUILD -std=$CXX_STANDARD" linkflags=$LDFLAGS -sBOOST_BUILD_PATH=. > >(python $BOOST/libs/$PROJECT_TO_TEST/filter_section_warning.py)
+    - ../../../b2 without-valgrind address-model=64 architecture=x86 toolset=$TOOLSET cxxflags="--coverage -DBOOST_TRAVISCI_BUILD -std=$CXX_STANDARD" linkflags=$LDFLAGS -sBOOST_BUILD_PATH=. > >(python $BOOST/libs/$PROJECT_TO_TEST/filter_section_warning.py)
 after_success:
     # Copying Coveralls data to a separate folder
     - mkdir -p $TRAVIS_BUILD_DIR/coverals
diff --git a/filter_section_warning.py b/filter_section_warning.py
index f0174d49..a03eea17 100644
--- a/filter_section_warning.py
+++ b/filter_section_warning.py
@@ -2,13 +2,8 @@
 #
 
 import sys
-import subprocess
 
-b2 = subprocess.Popen(sys.argv[1:], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True)
-
-while not b2.returncode:
-    line = b2.stdout.readline()
-    if not line: break;
+for line in sys.stdin:
     # If line is a 'noisy' warning, don't print it or the following two lines.
     if ('warning: section' in line and 'is deprecated' in line
             or 'note: change section name to' in line):
@@ -16,6 +11,4 @@ while not b2.returncode:
         next(sys.stdin)
     else:
         sys.stdout.write(line)
-        sys.stdout.flush()
-
-exit(b2.returncode)
\ No newline at end of file
+        sys.stdout.flush()
\ No newline at end of file