diff --git a/.travis.yml b/.travis.yml
index 26e210d..ce47432 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -62,7 +62,12 @@ before_script:
   - mkdir build
   - cd build
   - export VERBOSE=1
-  - cmake -G"${GENERATOR}" -DCMAKE_CXX_COMPILER=${CXX} -DCMAKE_C_COMPILER=${CC} -DCMAKE_BUILD_TYPE=${CONFIG} ..
+  - |
+    if [ "${GHC_COVERAGE}" = "1" ]; then
+      cmake -G"${GENERATOR}" -DCMAKE_CXX_COMPILER=${CXX} -DCMAKE_C_COMPILER=${CC} -DCMAKE_BUILD_TYPE=${CONFIG} -DGHC_COVERAGE=ON ..
+    else
+      cmake -G"${GENERATOR}" -DCMAKE_CXX_COMPILER=${CXX} -DCMAKE_C_COMPILER=${CC} -DCMAKE_BUILD_TYPE=${CONFIG} ..
+    fi
 
 script:
   - export VERBOSE=1
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index ffc2e4b..862681b 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -3,7 +3,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/")
 set(PARSE_CATCH_TESTS_ADD_TO_CONFIGURE_DEPENDS ON)
 include(ParseAndAddCatchTests)
 
-if(NOT ENV{GHC_COVERAGE})
+if(GHC_COVERAGE)
     add_executable(filesystem_test filesystem_test.cpp catch.hpp)
     target_link_libraries(filesystem_test ghc_filesystem)
     target_compile_options(filesystem_test PRIVATE