diff --git a/src/lib/util/process_spawn.h b/src/lib/util/process_spawn.h
index c4e931047d..99bbe4efb6 100644
--- a/src/lib/util/process_spawn.h
+++ b/src/lib/util/process_spawn.h
@@ -75,7 +75,7 @@ public:
     /// @param vars Environment variables for the program to be executed.
     ProcessSpawn(const std::string& executable,
                  const ProcessArgs& args = ProcessArgs(),
-                 const ProcessEnvVars& = ProcessEnvVars());
+                 const ProcessEnvVars& vars = ProcessEnvVars());
 
     /// @brief Destructor.
     ~ProcessSpawn();
diff --git a/src/lib/util/tests/process_spawn_app.sh.in b/src/lib/util/tests/process_spawn_app.sh.in
index 806e7bd702..7c4877c4e3 100644
--- a/src/lib/util/tests/process_spawn_app.sh.in
+++ b/src/lib/util/tests/process_spawn_app.sh.in
@@ -50,7 +50,7 @@ do
             VAR_NAME=${1}
             shift
             VAR_VALUE=${1}
-            EXPECTED=$(env | grep ${VAR_NAME})
+            EXPECTED=$(env | grep "${VAR_NAME}")
             if ! test "${VAR_NAME}=${VAR_VALUE}" = "${EXPECTED}"; then
                 exit 123
             fi