diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1d2c403..7989122 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
     - name: Build
       run: cd build && make -j
     - name: Perform unit tests
-      run: cd build && OMP_NUM_THREADS=1 make test # suppress parallel sections for tests
+      run: cd build && make test
     - name: Perform code coverage
       run: |
         cd build
diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
index 07dcbfe..f92c3cf 100644
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -51,7 +51,7 @@ endif()
 
 # add unpacking of dataset to the test suite
 add_test(NAME DatasetSetup COMMAND tar -xvjf dataset.tar.bz2)
-add_test(NAME DatasetCleanup COMMAND rm -rvf CHGCAR_* PARCHG_*)
+add_test(NAME DatasetCleanup COMMAND rm -rvf CHGCAR_* PARCHG_* *.d2o *.cub)
 set_tests_properties(DatasetSetup PROPERTIES FIXTURES_SETUP Dataset)
 set_tests_properties(DatasetCleanup PROPERTIES FIXTURES_CLEANUP Dataset)
 
diff --git a/src/test/test_scalarfield.cpp b/src/test/test_scalarfield.cpp
index 8a76299..0cf2d82 100644
--- a/src/test/test_scalarfield.cpp
+++ b/src/test/test_scalarfield.cpp
@@ -28,7 +28,7 @@ void TestScalarField::setUp() {
 void TestScalarField::tearDown() {
 }
 
-void TestScalarField::testReading() {
+void TestScalarField::testReadingCHGCAR() {
     // create scalar field
     ScalarField sf("CHGCAR_CH4", ScalarFieldInputFileType::SFF_CHGCAR);
     CPPUNIT_ASSERT_EQUAL( (uint)0, sf.get_size() );
@@ -90,3 +90,8 @@ void TestScalarField::testReading() {
                                   sf.get_value_interp(0.0,0.0,10.0),
                                   1e-12);
 }
+
+void TestScalarField::testReadingCUB() {
+    // test reading sf file
+    ScalarField sf("co_2pi_x.cub", ScalarFieldInputFileType::SFF_CUB);
+}
diff --git a/src/test/test_scalarfield.h b/src/test/test_scalarfield.h
index d6bf7e9..0444dc8 100644
--- a/src/test/test_scalarfield.h
+++ b/src/test/test_scalarfield.h
@@ -28,15 +28,16 @@
 class TestScalarField : public CppUnit::TestFixture
 {
   CPPUNIT_TEST_SUITE( TestScalarField );
-  CPPUNIT_TEST( testReading );
+  CPPUNIT_TEST( testReadingCHGCAR );
+  CPPUNIT_TEST( testReadingCUB );
   CPPUNIT_TEST_SUITE_END();
 
 public:
   void setUp();
   void tearDown();
 
-  void testReading();
-  void testD2OFileFormat();
+  void testReadingCHGCAR();
+  void testReadingCUB();
 
 private:
 };
diff --git a/src/test/testinput/ch4.d2o b/src/test/testinput/ch4.d2o
deleted file mode 100644
index 5c5295d..0000000
Binary files a/src/test/testinput/ch4.d2o and /dev/null differ
diff --git a/src/test/testinput/dataset.tar.bz2 b/src/test/testinput/dataset.tar.bz2
index db64312..d3ac2de 100644
Binary files a/src/test/testinput/dataset.tar.bz2 and b/src/test/testinput/dataset.tar.bz2 differ