diff --git a/test/fetchzip.sh b/test/fetchzip.sh
index 214ed5e..6d5e755 100755
--- a/test/fetchzip.sh
+++ b/test/fetchzip.sh
@@ -5,23 +5,23 @@
 
 PORT=$(getRandomPort)
 
-$DUB remove gitcompatibledubpackage --non-interactive 2>/dev/null || true
+${DUB} remove gitcompatibledubpackage --non-interactive 2>/dev/null || true
 
-"$DUB" build --single "$DIR"/test_registry.d
+${DUB} build --single "$DIR"/test_registry.d
 "$DIR"/test_registry --folder="$DIR/issue1336-registry" --port=$PORT &
 PID=$!
 sleep 1
 trap 'kill $PID 2>/dev/null || true' exit
 
 echo "Trying to download gitcompatibledubpackage (1.0.4)"
-timeout 1s "$DUB" fetch gitcompatibledubpackage --version=1.0.4 --skip-registry=all --registry=http://localhost:$PORT
+timeout 1s ${DUB} fetch gitcompatibledubpackage --version=1.0.4 --skip-registry=all --registry=http://localhost:$PORT
 if [ $? -eq 124 ]; then
     die $LINENO 'Fetching from responsive registry should not time-out.'
 fi
-$DUB remove gitcompatibledubpackage --non-interactive --version=1.0.4
+${DUB} remove gitcompatibledubpackage --non-interactive --version=1.0.4
 
 echo "Downloads should be retried when the zip is corrupted - gitcompatibledubpackage (1.0.3)"
-zipOut=$(! timeout 1s "$DUB" fetch gitcompatibledubpackage --version=1.0.3 --skip-registry=all --registry=http://localhost:$PORT 2>&1)
+zipOut=$(! timeout 1s ${DUB} fetch gitcompatibledubpackage --version=1.0.3 --skip-registry=all --registry=http://localhost:$PORT 2>&1)
 rc=$?
 
 if ! zipCount=$(grep -Fc 'Failed to extract zip archive' <<<"$zipOut") || [ "$zipCount" -lt 3 ] ; then
@@ -32,12 +32,12 @@
 elif [ $rc -eq 124 ]; then
     die $LINENO 'DUB timed out unexpectedly.'
 fi
-if dub remove gitcompatibledubpackage --non-interactive 2>/dev/null; then
+if ${DUB} remove gitcompatibledubpackage --non-interactive 2>/dev/null; then
     die $LINENO 'DUB should not have installed a broken package.'
 fi
 
 echo "HTTP status errors on downloads should be retried - gitcompatibledubpackage (1.0.2)"
-retryOut=$(! timeout 1s "$DUB" fetch gitcompatibledubpackage --version=1.0.2 --skip-registry=all --registry=http://localhost:$PORT --vverbose 2>&1)
+retryOut=$(! timeout 1s ${DUB} fetch gitcompatibledubpackage --version=1.0.2 --skip-registry=all --registry=http://localhost:$PORT --vverbose 2>&1)
 rc=$?
 if ! retryCount=$(echo "$retryOut" | grep -Fc 'Bad Gateway') || [ "$retryCount" -lt 3 ] ; then
     echo '========== +Output was ==========' >&2
@@ -47,7 +47,7 @@
 elif [ $rc -eq 124 ]; then
     die $LINENO 'DUB timed out unexpectedly.'
 fi
-if $DUB remove gitcompatibledubpackage --non-interactive 2>/dev/null; then
+if ${DUB} remove gitcompatibledubpackage --non-interactive 2>/dev/null; then
     die $LINENO 'DUB should not have installed a package.'
 fi
 
@@ -56,4 +56,4 @@
 if [ $? -eq 124 ]; then
     die $LINENO 'Fetching from responsive registry should not time-out.'
 fi
-$DUB remove gitcompatibledubpackage --non-interactive --version=1.0.2
+${DUB} remove gitcompatibledubpackage --non-interactive --version=1.0.2
diff --git a/test/issue1401-filesystem-supplier.sh b/test/issue1401-filesystem-supplier.sh
index 3120392..9811c32 100755
--- a/test/issue1401-filesystem-supplier.sh
+++ b/test/issue1401-filesystem-supplier.sh
@@ -3,26 +3,26 @@
 
 . "$DIR"/common.sh
 
-dub remove fs-json-dubpackage --non-interactive 2>/dev/null || true
-dub remove fs-sdl-dubpackage --non-interactive 2>/dev/null || true
+${DUB} remove fs-json-dubpackage --non-interactive 2>/dev/null || true
+${DUB} remove fs-sdl-dubpackage --non-interactive 2>/dev/null || true
 
 echo "Trying to get fs-sdl-dubpackage (1.0.5)"
-"$DUB" fetch fs-sdl-dubpackage --version=1.0.5 --skip-registry=all --registry=file://"$DIR"/issue1401-file-system-pkg-supplier
+${DUB} fetch fs-sdl-dubpackage --version=1.0.5 --skip-registry=all --registry=file://"$DIR"/issue1401-file-system-pkg-supplier
 
-if ! dub remove fs-sdl-dubpackage --non-interactive --version=1.0.5 2>/dev/null; then
+if ! ${DUB} remove fs-sdl-dubpackage --non-interactive --version=1.0.5 2>/dev/null; then
     die $LINENO 'DUB did not install package from file system.'
 fi
 
 echo "Trying to get fs-sdl-dubpackage (latest)"
-"$DUB" fetch fs-sdl-dubpackage --skip-registry=all --registry=file://"$DIR"/issue1401-file-system-pkg-supplier
+${DUB} fetch fs-sdl-dubpackage --skip-registry=all --registry=file://"$DIR"/issue1401-file-system-pkg-supplier
 
-if ! dub remove fs-sdl-dubpackage --non-interactive --version=1.0.6 2>/dev/null; then
+if ! ${DUB} remove fs-sdl-dubpackage --non-interactive --version=1.0.6 2>/dev/null; then
     die $LINENO 'DUB did not install latest package from file system.'
 fi
 
 echo "Trying to get fs-json-dubpackage (1.0.7)"
-"$DUB" fetch fs-json-dubpackage --version=1.0.7 --skip-registry=all --registry=file://"$DIR"/issue1401-file-system-pkg-supplier
+${DUB} fetch fs-json-dubpackage --version=1.0.7 --skip-registry=all --registry=file://"$DIR"/issue1401-file-system-pkg-supplier
 
-if ! dub remove fs-json-dubpackage --non-interactive --version=1.0.7 2>/dev/null; then
+if ! ${DUB} remove fs-json-dubpackage --non-interactive --version=1.0.7 2>/dev/null; then
     die $LINENO 'DUB did not install package from file system.'
 fi
diff --git a/test/issue1416-maven-repo-pkg-supplier.sh b/test/issue1416-maven-repo-pkg-supplier.sh
index 7771e81..4e0b32d 100755
--- a/test/issue1416-maven-repo-pkg-supplier.sh
+++ b/test/issue1416-maven-repo-pkg-supplier.sh
@@ -5,27 +5,27 @@
 
 PORT=$(getRandomPort)
 
-$DUB remove maven-dubpackage --non-interactive 2>/dev/null || true
+${DUB} remove maven-dubpackage --non-interactive 2>/dev/null || true
 
-"$DUB" build --single "$DIR"/test_registry.d
+${DUB} build --single "$DIR"/test_registry.d
 "$DIR"/test_registry --folder="$DIR/issue1416-maven-repo-pkg-supplier" --port=$PORT &
 PID=$!
 sleep 1
 trap 'kill $PID 2>/dev/null || true' exit
 
 echo "Trying to download maven-dubpackage (1.0.5)"
-"$DUB" fetch maven-dubpackage --version=1.0.5 --skip-registry=all --registry=mvn+http://localhost:$PORT/maven/release/dubpackages
+${DUB} fetch maven-dubpackage --version=1.0.5 --skip-registry=all --registry=mvn+http://localhost:$PORT/maven/release/dubpackages
 
-if ! dub remove maven-dubpackage --non-interactive --version=1.0.5 2>/dev/null; then
+if ! ${DUB} remove maven-dubpackage --non-interactive --version=1.0.5 2>/dev/null; then
     die $LINENO 'DUB did not install package from maven registry.'
 fi
 
 echo "Trying to download maven-dubpackage (latest)"
-"$DUB" fetch maven-dubpackage --skip-registry=all --registry=mvn+http://localhost:$PORT/maven/release/dubpackages
+${DUB} fetch maven-dubpackage --skip-registry=all --registry=mvn+http://localhost:$PORT/maven/release/dubpackages
 
-if ! dub remove maven-dubpackage --non-interactive --version=1.0.6 2>/dev/null; then
+if ! ${DUB} remove maven-dubpackage --non-interactive --version=1.0.6 2>/dev/null; then
     die $LINENO 'DUB fetch did not install latest package from maven registry.'
 fi
 
 echo "Trying to search (exact) maven-dubpackage"
-"$DUB" search maven-dubpackage --skip-registry=all --registry=mvn+http://localhost:$PORT/maven/release/dubpackages | grep -c "maven-dubpackage (1.0.6)"
+${DUB} search maven-dubpackage --skip-registry=all --registry=mvn+http://localhost:$PORT/maven/release/dubpackages | grep -c "maven-dubpackage (1.0.6)"
diff --git a/test/issue1524-maven-upgrade-dependency-tree.sh b/test/issue1524-maven-upgrade-dependency-tree.sh
index 8cd6474..a8b2c32 100755
--- a/test/issue1524-maven-upgrade-dependency-tree.sh
+++ b/test/issue1524-maven-upgrade-dependency-tree.sh
@@ -5,23 +5,23 @@
 
 PORT=$(getRandomPort)
 
-dub remove maven-dubpackage-a --non-interactive 2>/dev/null || true
-dub remove maven-dubpackage-b --non-interactive 2>/dev/null || true
+${DUB} remove maven-dubpackage-a --non-interactive 2>/dev/null || true
+${DUB} remove maven-dubpackage-b --non-interactive 2>/dev/null || true
 
-"$DUB" build --single "$DIR"/test_registry.d
+${DUB} build --single "$DIR"/test_registry.d
 "$DIR"/test_registry --folder="$DIR/issue1524-maven-upgrade-dependency-tree" --port=$PORT &
 PID=$!
 sleep 1
 trap 'kill $PID 2>/dev/null || true' exit
 
 echo "Trying to download maven-dubpackage-a (1.0.5) with dependency to maven-dubpackage-b (1.0.6)"
-"$DUB" upgrade --root "$DIR/issue1524-maven-upgrade-dependency-tree" --skip-registry=standard --registry=mvn+http://localhost:$PORT/maven/release/dubpackages
+${DUB} upgrade --root "$DIR/issue1524-maven-upgrade-dependency-tree" --skip-registry=standard --registry=mvn+http://localhost:$PORT/maven/release/dubpackages
 
-if ! dub remove maven-dubpackage-a --non-interactive --version=1.0.5 2>/dev/null; then
+if ! ${DUB} remove maven-dubpackage-a --non-interactive --version=1.0.5 2>/dev/null; then
     die $LINENO 'DUB did not install package "maven-dubpackage-a" from maven registry.'
 fi
 
-if ! dub remove maven-dubpackage-b --non-interactive --version=1.0.6 2>/dev/null; then
+if ! ${DUB} remove maven-dubpackage-b --non-interactive --version=1.0.6 2>/dev/null; then
     die $LINENO 'DUB did not install package "maven-dubpackage-b" from maven registry.'
 fi
 
diff --git a/test/issue1567-fetch-sub-package.sh b/test/issue1567-fetch-sub-package.sh
index e7760df..544ef63 100755
--- a/test/issue1567-fetch-sub-package.sh
+++ b/test/issue1567-fetch-sub-package.sh
@@ -4,9 +4,9 @@
 packname="fetch-sub-package-dubpackage"
 sub_packagename="my-sub-package"
 
-$DUB remove $packname --non-interactive 2>/dev/null || true
-$DUB fetch "$packname:$sub_packagename" --skip-registry=all --registry=file://"$DIR"/issue1567-fetch-sub-package
+${DUB} remove $packname --non-interactive 2>/dev/null || true
+${DUB} fetch "$packname:$sub_packagename" --skip-registry=all --registry=file://"$DIR"/issue1567-fetch-sub-package
 
-if ! dub remove $packname --non-interactive --version=1.0.1 2>/dev/null; then
+if ! ${DUB} remove $packname --non-interactive --version=1.0.1 2>/dev/null; then
     die $LINENO 'DUB did not install package $packname:$sub_packagename.'
 fi