diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index a25595fc..3340dcee 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -84,7 +84,7 @@ boost_test(TYPE run SOURCES histogram_operators_test.cpp
   COMPILE_OPTIONS $<$<CXX_COMPILER_ID:MSVC>:/bigobj>)
 boost_test(TYPE run SOURCES histogram_ostream_test.cpp)
 boost_test(TYPE run SOURCES histogram_ostream_ascii_test.cpp)
-set_tests_properties(run-boost_histogram-histogram_ostream_ascii_test_cpp
+set_tests_properties(run-boost_histogram-histogram_ostream_ascii_test
   PROPERTIES ENVIRONMENT "LANG=FOO;COLUMNS=20")
 boost_test(TYPE run SOURCES histogram_test.cpp)
 boost_test(TYPE run SOURCES indexed_test.cpp)