diff --git a/.github/workflows/developer.yml b/.github/workflows/developer.yml
index 57cc63f2..7f06cad0 100644
--- a/.github/workflows/developer.yml
+++ b/.github/workflows/developer.yml
@@ -84,3 +84,4 @@ jobs:
         cd b
         cmake ..
         make VERBOSE=1
+        make test
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6ea4139c..c9dee2be 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -179,3 +179,9 @@ if(BUILD_LIB)
     DESTINATION ${CONFIG_INSTALL_DESTINATION})
 endif()
 
+# Turn on unit testing.
+include(CTest)
+if(BUILD_TESTING)
+  add_subdirectory(tests)
+endif()
+
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
new file mode 100644
index 00000000..be430b7e
--- /dev/null
+++ b/tests/CMakeLists.txt
@@ -0,0 +1,17 @@
+# This is the CMake file for the test directory in the wgrib2
+# project. 
+#
+# Ed Hartnett 3/27/24
+
+# Run each shell test.
+function(shell_test name)
+  # Copy the test scripts.
+  file(COPY "${CMAKE_SOURCE_DIR}/tests/${name}.sh"
+    DESTINATION ${CMAKE_BINARY_DIR}/tests
+    FILE_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+  # Add the shell script as a test.
+  add_test(NAME ${name}.sh COMMAND bash ${name}.sh)
+endfunction()
+
+# Run these shell tests.
+shell_test(run_wgrib2_tests)
diff --git a/tests/run_wgrib2_tests.sh b/tests/run_wgrib2_tests.sh
new file mode 100644
index 00000000..31e08835
--- /dev/null
+++ b/tests/run_wgrib2_tests.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+# This is a test script for the wgrib2 project.
+#
+# Ed Hartnett, 3/27/24
+
+set -e
+echo ""
+echo "*** Running wgrib2 test"
+
+# Just run executable. For some reason it returns 8.
+ls -l ../wgrib2
+../wgrib2/wgrib2 > out.txt  && exit 1
+[ $? -ne 8 ] && exit 2
+
+echo "*** SUCCESS!"
+exit 0