diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 35d978d02d3836d420e2f2b09c2f925e867918cb..c24946cd10dc69d536b2b640b315799d87ec420c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -26,6 +26,7 @@ test:centos7.3:
     - source /export/soft/lua_lmod/centos7/lmod/lmod/init/bash
     - module use /scicore/soft/modules/all
     - module load foss/2021a
+    - module load wget/1.21.1-GCCcore-10.3.0
     - module load CMake/3.23.1-GCCcore-10.3.0
     - module load Python/3.9.5-GCCcore-10.3.0
     - module load Eigen/3.4.0-GCCcore-10.3.0
@@ -74,9 +75,20 @@ test:centos7.3:
              -DCMAKE_C_FLAGS='-L${EBROOTLIBPNG}/lib/ -L${EBROOTLIBTIFF}/lib/ -L${EBROOTZLIB}/lib/ -isystem ${EBROOTBOOST}/include -isystem ${EBROOTOPENMM}/include'
              -DCMAKE_CXX_FLAGS='-L${EBROOTLIBPNG}/lib/ -L${EBROOTLIBTIFF}/lib/ -L${EBROOTZLIB}/lib/ -isystem ${EBROOTBOOST}/include -isystem ${EBROOTOPENMM}/include'
              -DCMAKE_EXE_LINKER_FLAGS=" -pthread"
-  - make -j 2
+  - make -j 2 chemdict_tool
   - echo "    ... done building OST."
-  - echo "    Running unit tests for OST..."  
+  - echo "    Downloading chemical compounds..."
+  - wget ftp://ftp.wwpdb.org/pub/pdb/data/monomers/components.cif.gz
+  - echo "    ... done downloading compounds"
+  - echo "    Building a compound library..."
+  - stage/bin/chemdict_tool create components.cif.gz compounds.chemlib pdb -i
+  - stage/bin/chemdict_tool update ../modules/conop/data/charmm.cif compounds.chemlib charmm
+  - echo "    ... done building the compound lib."
+  - echo "    Building OST with the compound lib..."
+  - cmake .. -DCOMPOUND_LIB=compounds.chemlib
+  - make -j 2
+  - echo "    ... done building OST with the compound library..."
+  - echo "    Running unit tests for OST..."
   - make check
   - echo "    ... done running unit tests for OST..." 
   - echo "... done testing on CentOS 7."