diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 56727ce7a..33a2c9f49 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -3939,70 +3939,70 @@ build_test_config_combos() {
     # syntax: build_test_config_combos FILE VALIDATOR_FUNCTION OPT1 OPT2 ...
     # The validator function may be "" if all combinations are valid
 
-    FILE=$1
+    file=$1
     shift
     # this function must echo something iff the clang "-DA -DB ..." string is invalid
-    VALIDATE_OPTIONS=$1
+    validate_options=$1
     shift
-    OPTIONS=("$@")
+    options=("$@")
 
     # clear all of the options so that they can be overridden on the clang commandline
-    for OPT in "${OPTIONS[@]}"; do
-        ./scripts/config.py unset ${OPT}
+    for opt in "${options[@]}"; do
+        ./scripts/config.py unset ${opt}
     done
 
     # enter the directory containing the target file & strip the dir from the filename
-    cd $(dirname ${FILE})
-    FILE=$(basename ${FILE})
+    cd $(dirname ${file})
+    file=$(basename ${file})
 
     # The most common issue is unused variables/functions, so ensure -Wunused is set.
-    WARNING_FLAGS="-Werror -Wall -Wextra -Wwrite-strings -Wpointer-arith -Wimplicit-fallthrough -Wshadow -Wvla -Wformat=2 -Wno-format-nonliteral -Wshadow -Wasm-operand-widths -Wunused"
+    warning_flags="-Werror -Wall -Wextra -Wwrite-strings -Wpointer-arith -Wimplicit-fallthrough -Wshadow -Wvla -Wformat=2 -Wno-format-nonliteral -Wshadow -Wasm-operand-widths -Wunused"
 
     # Extract the command generated by the Makefile to build the target file.
     # This ensures that we have any include paths, macro definitions, etc
     # that may be applied by make.
     # Add -fsyntax-only as we only want a syntax check and don't need to generate a file.
-    COMPILE_CMD=$(make -B -n ${FILE} CC=clang CFLAGS="${WARNING_FLAGS} -fsyntax-only" | egrep "^clang")
+    compile_cmd=$(make -B -n ${file} CC=clang CFLAGS="${warning_flags} -fsyntax-only" | egrep "^clang")
 
-    MAKEFILE=$(mktemp)
-    DEPS=""
+    makefile=$(mktemp)
+    deps=""
 
-    LEN=${#OPTIONS[@]}
+    len=${#options[@]}
 
-    for ((i = 0; i < $((2**${LEN})); i++)); do
+    for ((i = 0; i < $((2**${len})); i++)); do
         # generate each of 2^n combinations of options
-        # each bit of $i is used to determine if OPTIONS[i] will be set or not
-        TARGET="t"
-        CLANG_ARGS=""
-        for ((j = 0; j < ${LEN}; j++)); do
-            OPT=${OPTIONS[j]}
+        # each bit of $i is used to determine if options[i] will be set or not
+        target="t"
+        clang_args=""
+        for ((j = 0; j < ${len}; j++)); do
+            opt=${options[j]}
             X=$(((i >> j) & 1))
-            [[ $X == 0 ]] && OPT="" || OPT="-D${OPT}"
-            CLANG_ARGS="${CLANG_ARGS} ${OPT}"
-            TARGET="${TARGET}${OPT}"
+            [[ $X == 0 ]] && opt="" || opt="-D${opt}"
+            clang_args="${clang_args} ${opt}"
+            target="${target}${opt}"
         done
 
         # check that combination is not known to be invalid
-        INVALID=""
-        [[ "$VALIDATE_OPTIONS" != "" ]] && INVALID=$(${VALIDATE_OPTIONS} "${CLANG_ARGS}")
+        invalid=""
+        [[ "$validate_options" != "" ]] && invalid=$(${validate_options} "${clang_args}")
 
         # if valid, add it to the makefile
-        if [[ "$INVALID" == "" ]]; then
-            cmd="${COMPILE_CMD} ${CLANG_ARGS}"
-            echo "${TARGET}:" >> ${MAKEFILE}
-            echo -e "\t$cmd" >> ${MAKEFILE}
+        if [[ "$invalid" == "" ]]; then
+            cmd="${compile_cmd} ${clang_args}"
+            echo "${target}:" >> ${makefile}
+            echo -e "\t$cmd" >> ${makefile}
 
-            DEPS="${DEPS} ${TARGET}"
+            deps="${deps} ${target}"
         fi
     done
 
-    echo "all: ${DEPS}" >> ${MAKEFILE}
+    echo "all: ${deps}" >> ${makefile}
 
     # execute all of the commands via Make (probably in parallel)
-    make -s -f ${MAKEFILE} all
+    make -s -f ${makefile} all
 
     # clean up the temporary makefile
-    rm ${MAKEFILE}
+    rm ${makefile}
 }
 
 validate_aes_config_variations() {