diff --git a/test/external/gb-starter-kit.cfg b/test/external/gb-starter-kit.cfg
index 57ec4b77..5d4f6656 100644
--- a/test/external/gb-starter-kit.cfg
+++ b/test/external/gb-starter-kit.cfg
@@ -1,7 +1,7 @@
-EXTERNAL_TEST_OWNER=ISSOtm
-EXTERNAL_TEST_REPO=gb-starter-kit
-EXTERNAL_TEST_DOMAIN=codeberg.org
-EXTERNAL_TEST_COMMIT=74b647d62ff74b40d2b52e585cbebe148463212e
-EXTERNAL_TEST_TARGET=all
-EXTERNAL_TEST_FILE=bin/boilerplate.gb
-EXTERNAL_TEST_HASH=b4f130169ba73284e0d0e71b53e7baa4eca2f7fe
+EXT_TEST_OWNER=ISSOtm
+EXT_TEST_REPO=gb-starter-kit
+EXT_TEST_DOMAIN=codeberg.org
+EXT_TEST_COMMIT=74b647d62ff74b40d2b52e585cbebe148463212e
+EXT_TEST_TARGET=all
+EXT_TEST_FILE=bin/boilerplate.gb
+EXT_TEST_HASH=b4f130169ba73284e0d0e71b53e7baa4eca2f7fe
diff --git a/test/external/ladx.cfg b/test/external/ladx.cfg
index d35903f4..355a4c30 100644
--- a/test/external/ladx.cfg
+++ b/test/external/ladx.cfg
@@ -1,7 +1,7 @@
-EXTERNAL_TEST_OWNER=zladx
-EXTERNAL_TEST_REPO=LADX-Disassembly
-EXTERNAL_TEST_DOMAIN=github.com
-EXTERNAL_TEST_COMMIT=c77af4473e7a877c68e1de34a2aaf80e9076dc35
-EXTERNAL_TEST_TARGET=default
-EXTERNAL_TEST_FILE=azle.gbc
-EXTERNAL_TEST_HASH=d90ac17e9bf17b6c61624ad9f05447bdb5efc01a
+EXT_TEST_OWNER=zladx
+EXT_TEST_REPO=LADX-Disassembly
+EXT_TEST_DOMAIN=github.com
+EXT_TEST_COMMIT=c77af4473e7a877c68e1de34a2aaf80e9076dc35
+EXT_TEST_TARGET=default
+EXT_TEST_FILE=azle.gbc
+EXT_TEST_HASH=d90ac17e9bf17b6c61624ad9f05447bdb5efc01a
diff --git a/test/external/libbet.cfg b/test/external/libbet.cfg
index 55fa007d..9c6557e5 100644
--- a/test/external/libbet.cfg
+++ b/test/external/libbet.cfg
@@ -1,7 +1,7 @@
-EXTERNAL_TEST_OWNER=pinobatch
-EXTERNAL_TEST_REPO=libbet
-EXTERNAL_TEST_DOMAIN=github.com
-EXTERNAL_TEST_COMMIT=e42c0036b18e6e715987b88b4973389b283974c9
-EXTERNAL_TEST_TARGET=all
-EXTERNAL_TEST_FILE=libbet.gb
-EXTERNAL_TEST_HASH=f117089aa056600e2d404bbcbac96b016fc64611
+EXT_TEST_OWNER=pinobatch
+EXT_TEST_REPO=libbet
+EXT_TEST_DOMAIN=github.com
+EXT_TEST_COMMIT=e42c0036b18e6e715987b88b4973389b283974c9
+EXT_TEST_TARGET=all
+EXT_TEST_FILE=libbet.gb
+EXT_TEST_HASH=f117089aa056600e2d404bbcbac96b016fc64611
diff --git a/test/external/pokecrystal.cfg b/test/external/pokecrystal.cfg
index 835d0a47..316fa87d 100644
--- a/test/external/pokecrystal.cfg
+++ b/test/external/pokecrystal.cfg
@@ -1,7 +1,7 @@
-EXTERNAL_TEST_OWNER=pret
-EXTERNAL_TEST_REPO=pokecrystal
-EXTERNAL_TEST_DOMAIN=github.com
-EXTERNAL_TEST_COMMIT=2bbb15675de0d2bbebc8cc9978f5c7fb15bc73b9
-EXTERNAL_TEST_TARGET=compare
-EXTERNAL_TEST_FILE=pokecrystal.gbc
-EXTERNAL_TEST_HASH=f4cd194bdee0d04ca4eac29e09b8e4e9d818c133
+EXT_TEST_OWNER=pret
+EXT_TEST_REPO=pokecrystal
+EXT_TEST_DOMAIN=github.com
+EXT_TEST_COMMIT=2bbb15675de0d2bbebc8cc9978f5c7fb15bc73b9
+EXT_TEST_TARGET=compare
+EXT_TEST_FILE=pokecrystal.gbc
+EXT_TEST_HASH=f4cd194bdee0d04ca4eac29e09b8e4e9d818c133
diff --git a/test/external/pokered.cfg b/test/external/pokered.cfg
index 03acffea..836f98dd 100644
--- a/test/external/pokered.cfg
+++ b/test/external/pokered.cfg
@@ -1,7 +1,7 @@
-EXTERNAL_TEST_OWNER=pret
-EXTERNAL_TEST_REPO=pokered
-EXTERNAL_TEST_DOMAIN=github.com
-EXTERNAL_TEST_COMMIT=0555b42dc0ceffaae613e97cc0cf2e8c0b45013c
-EXTERNAL_TEST_TARGET=compare
-EXTERNAL_TEST_FILE=pokered.gbc
-EXTERNAL_TEST_HASH=ea9bcae617fdf159b045185467ae58b2e4a48b9a
+EXT_TEST_OWNER=pret
+EXT_TEST_REPO=pokered
+EXT_TEST_DOMAIN=github.com
+EXT_TEST_COMMIT=0555b42dc0ceffaae613e97cc0cf2e8c0b45013c
+EXT_TEST_TARGET=compare
+EXT_TEST_FILE=pokered.gbc
+EXT_TEST_HASH=ea9bcae617fdf159b045185467ae58b2e4a48b9a
diff --git a/test/external/sameboy.cfg b/test/external/sameboy.cfg
index 49ba2dc3..27df1415 100644
--- a/test/external/sameboy.cfg
+++ b/test/external/sameboy.cfg
@@ -1,7 +1,7 @@
-EXTERNAL_TEST_OWNER=LIJI32
-EXTERNAL_TEST_REPO=SameBoy
-EXTERNAL_TEST_DOMAIN=github.com
-EXTERNAL_TEST_COMMIT=2f4a6f231ec40ecfc0ab7df0a09eb932e7ccddec
-EXTERNAL_TEST_TARGET=bootroms
-EXTERNAL_TEST_FILE=build/bin/BootROMs/cgb_boot.bin
-EXTERNAL_TEST_HASH=113903775a9d34b798c2f8076672da6626815a91
+EXT_TEST_OWNER=LIJI32
+EXT_TEST_REPO=SameBoy
+EXT_TEST_DOMAIN=github.com
+EXT_TEST_COMMIT=2f4a6f231ec40ecfc0ab7df0a09eb932e7ccddec
+EXT_TEST_TARGET=bootroms
+EXT_TEST_FILE=build/bin/BootROMs/cgb_boot.bin
+EXT_TEST_HASH=113903775a9d34b798c2f8076672da6626815a91
diff --git a/test/external/test.sh b/test/external/test.sh
index d7a3da3c..06169d18 100755
--- a/test/external/test.sh
+++ b/test/external/test.sh
@@ -15,20 +15,20 @@ if [ ! -f "external/$1.cfg" ]; then
 	exit 1
 fi
 
-# Sourcing "external/$1.cfg" defines `EXTERNAL_TEST_*` values used below.
+# Sourcing "external/$1.cfg" defines `EXT_TEST_*` values used below.
 . "external/$1.cfg"
 
-if ! cd "$EXTERNAL_TEST_REPO"; then
+if ! cd "$EXT_TEST_REPO"; then
 	echo >&2 'Please fetch test deps before running any external test'
 	exit 1
 fi
 make clean $RGBDS_PATH
-make -j4 "$EXTERNAL_TEST_TARGET" $RGBDS_PATH
-hash="$(sha1sum -b "$EXTERNAL_TEST_FILE" | head -c 40)"
-if [ "$hash" != "$EXTERNAL_TEST_HASH" ]; then
+make -j4 "$EXT_TEST_TARGET" $RGBDS_PATH
+hash="$(sha1sum -b "$EXT_TEST_FILE" | head -c 40)"
+if [ "$hash" != "$EXT_TEST_HASH" ]; then
 	cat >&2 <<EOM
-error: "$EXTERNAL_TEST_FILE" checksum did not match!
-    Expected $EXTERNAL_TEST_HASH,
+error: "$EXT_TEST_FILE" checksum did not match!
+    Expected $EXT_TEST_HASH,
          got $hash
 EOM
 	exit 1
diff --git a/test/external/ucity.cfg b/test/external/ucity.cfg
index 2e1b8798..615cc904 100644
--- a/test/external/ucity.cfg
+++ b/test/external/ucity.cfg
@@ -1,7 +1,7 @@
-EXTERNAL_TEST_OWNER=AntonioND
-EXTERNAL_TEST_REPO=ucity
-EXTERNAL_TEST_DOMAIN=github.com
-EXTERNAL_TEST_COMMIT=d1880a2a112d7c26f16c0fc06a15b6c32fdc9137
-EXTERNAL_TEST_TARGET=all
-EXTERNAL_TEST_FILE=ucity.gbc
-EXTERNAL_TEST_HASH=5f026649611c9606ce0bf70dc1552e054e7df5bc
+EXT_TEST_OWNER=AntonioND
+EXT_TEST_REPO=ucity
+EXT_TEST_DOMAIN=github.com
+EXT_TEST_COMMIT=d1880a2a112d7c26f16c0fc06a15b6c32fdc9137
+EXT_TEST_TARGET=all
+EXT_TEST_FILE=ucity.gbc
+EXT_TEST_HASH=5f026649611c9606ce0bf70dc1552e054e7df5bc
diff --git a/test/fetch-test-deps.sh b/test/fetch-test-deps.sh
index 27d1435b..1feaded8 100755
--- a/test/fetch-test-deps.sh
+++ b/test/fetch-test-deps.sh
@@ -45,13 +45,13 @@ done
 case "$actionname" in
 	--get-hash)
 		action() {
-			printf "%s@%s-" "$EXTERNAL_TEST_REPO" "$EXTERNAL_TEST_COMMIT"
+			printf "%s@%s-" "$EXT_TEST_REPO" "$EXT_TEST_COMMIT"
 		}
 		;;
 
 	--get-paths)
 		action() {
-			printf "test/%s," "$EXTERNAL_TEST_REPO"
+			printf "test/%s," "$EXT_TEST_REPO"
 		}
 		;;
 
@@ -59,21 +59,21 @@ case "$actionname" in
 		echo "Fetching test dependency repositories"
 
 		action() {
-			if [ ! -d "$EXTERNAL_TEST_REPO" ]; then
-				git clone "https://$EXTERNAL_TEST_DOMAIN/$EXTERNAL_TEST_OWNER/$EXTERNAL_TEST_REPO.git" \
-					--revision="$EXTERNAL_TEST_COMMIT" --depth=1 --recursive --shallow-submodules \
+			if [ ! -d "$EXT_TEST_REPO" ]; then
+				git clone "https://$EXT_TEST_DOMAIN/$EXT_TEST_OWNER/$EXT_TEST_REPO.git" \
+					--revision="$EXT_TEST_COMMIT" --depth=1 --recursive --shallow-submodules \
 					--config advice.detachedHead=false
 			fi
-			pushd "$EXTERNAL_TEST_REPO"
-			git checkout --force --detach "$EXTERNAL_TEST_COMMIT" --
-			if [ -f "../patches/$EXTERNAL_TEST_REPO.patch" ]; then
-				git apply --ignore-whitespace "../patches/$EXTERNAL_TEST_REPO.patch"
+			pushd "$EXT_TEST_REPO"
+			git checkout --force --detach "$EXT_TEST_COMMIT" --
+			if [ -f "../patches/$EXT_TEST_REPO.patch" ]; then
+				git apply --ignore-whitespace "../patches/$EXT_TEST_REPO.patch"
 			fi
 			popd
 		}
 esac
 
-# Sourcing each "external/*.cfg" file defines `EXTERNAL_TEST_*` values used by the `action` functions.
+# Sourcing each "external/*.cfg" file defines `EXT_TEST_*` values used by the `action` functions.
 if "$nonfree"; then
 	. external/pokecrystal.cfg && action
 	. external/pokered.cfg     && action