diff --git a/docs/linux/README.md b/docs/linux/README.md
index 8ee91fbe81e..fe29b0d623a 100644
--- a/docs/linux/README.md
+++ b/docs/linux/README.md
@@ -102,6 +102,9 @@ sudo apt install -y lcov libdatetime-perl gcovr
 pip3 install coverage
 ```
 
+**Note:** You want lcov > 1.16, so you might have to download and install
+a newer version e.g. from <https://packages.ubuntu.com/mantic/lcov>.
+
 #### Creating and displaying code coverage reports
 
 All three projects (ibus-keyman, keyman-config, and keyman-system-service)
diff --git a/linux/keyman-config/build.sh b/linux/keyman-config/build.sh
index 35608c69eb7..9c0588f796b 100755
--- a/linux/keyman-config/build.sh
+++ b/linux/keyman-config/build.sh
@@ -46,7 +46,7 @@ execute_with_temp_schema() {
   TEMP_DATA_DIR=$(mktemp -d)
   SCHEMA_DIR="${TEMP_DATA_DIR}/glib-2.0/schemas"
   export XDG_DATA_DIRS="${TEMP_DATA_DIR}":${XDG_DATA_DIRS-}
-  export GSETTINGS_SCHEMA_DIR="${SCHEMA_DIR}"
+  export GSETTINGS_SCHEMA_DIR="${SCHEMA_DIR}:/usr/share/glib-2.0/schemas/:${GSETTINGS_SCHEMA_DIR-}"
   mkdir -p "${SCHEMA_DIR}"
   cp resources/com.keyman.gschema.xml "${SCHEMA_DIR}"/
   glib-compile-schemas "${SCHEMA_DIR}"
diff --git a/linux/keyman-config/run-tests.sh b/linux/keyman-config/run-tests.sh
index de81ec7f738..de99c55e8f2 100755
--- a/linux/keyman-config/run-tests.sh
+++ b/linux/keyman-config/run-tests.sh
@@ -16,10 +16,13 @@ if [ -n "$TEAMCITY_VERSION" ]; then
   if ! pip3 list --format=columns | grep -q teamcity-messages; then
       pip3 install teamcity-messages
   fi
-  python3 -m teamcity.unittestpy discover -s tests -p test_*.py
+  test_module=teamcity.unittestpy
 else
-  # shellcheck disable=SC2086
-  python3 ${coverage:-} -m unittest discover -v -s tests -p test_*.py
+  test_module=unittest
+  extra_opts=-v
 fi
 
+# shellcheck disable=SC2086
+python3 ${coverage:-} -m ${test_module:-} discover ${extra_opts:-} -s tests -p test_*.py
+
 rm -rf "$XDG_CONFIG_HOME"