diff --git a/bin/composer_install.sh b/bin/composer_install.sh
index 41e84f5..191b706 100755
--- a/bin/composer_install.sh
+++ b/bin/composer_install.sh
@@ -28,6 +28,6 @@ if [ -n "${working_directory}" ]; then
     composer_options+=("--working-dir" "${working_directory}")
 fi
 
-full_command="${composer_path} ${composer_command} ${composer_options[*]}"
+full_command="${php_path} ${composer_path} ${composer_command} ${composer_options[*]}"
 echo "::debug::Using the following Composer command: '${full_command}'"
 $full_command
diff --git a/tests/expect/composer_install_01.exp b/tests/expect/composer_install_01.exp
index f95b1f3..cebb2d8 100755
--- a/tests/expect/composer_install_01.exp
+++ b/tests/expect/composer_install_01.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "" "" "" "" "" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer install --no-interaction --no-progress --ansi'"
+expect "::debug::Using the following Composer command: '*/php */composer install --no-interaction --no-progress --ansi'"
 expect "Installing dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_02.exp b/tests/expect/composer_install_02.exp
index d5e8e77..9fc8bd9 100755
--- a/tests/expect/composer_install_02.exp
+++ b/tests/expect/composer_install_02.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "lowest" "" "" "" "" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer update --no-interaction --no-progress --ansi --prefer-lowest --prefer-stable'"
+expect "::debug::Using the following Composer command: '*/php */composer update --no-interaction --no-progress --ansi --prefer-lowest --prefer-stable'"
 expect "Updating dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_03.exp b/tests/expect/composer_install_03.exp
index 82b4c58..91c5469 100755
--- a/tests/expect/composer_install_03.exp
+++ b/tests/expect/composer_install_03.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "highest" "" "" "" "" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer update --no-interaction --no-progress --ansi'"
+expect "::debug::Using the following Composer command: '*/php */composer update --no-interaction --no-progress --ansi'"
 expect "Updating dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_04.exp b/tests/expect/composer_install_04.exp
index 9d0fef4..af9fa20 100755
--- a/tests/expect/composer_install_04.exp
+++ b/tests/expect/composer_install_04.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "locked" "" "" "" "" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer install --no-interaction --no-progress --ansi'"
+expect "::debug::Using the following Composer command: '*/php */composer install --no-interaction --no-progress --ansi'"
 expect "Installing dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_05.exp b/tests/expect/composer_install_05.exp
index 26b9f64..b2732dc 100755
--- a/tests/expect/composer_install_05.exp
+++ b/tests/expect/composer_install_05.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "" "--ignore-platform-reqs --optimize-autoloader" "" "" "" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer install --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader'"
+expect "::debug::Using the following Composer command: '*/php */composer install --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader'"
 expect "Installing dependencies"
 expect "Generating optimized autoload files"
 expect eof
diff --git a/tests/expect/composer_install_06.exp b/tests/expect/composer_install_06.exp
index 18486f3..c9e45ed 100755
--- a/tests/expect/composer_install_06.exp
+++ b/tests/expect/composer_install_06.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "lowest" "--ignore-platform-reqs --optimize-autoloader" "" "" "" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer update --no-interaction --no-progress --ansi --prefer-lowest --prefer-stable --ignore-platform-reqs --optimize-autoloader'"
+expect "::debug::Using the following Composer command: '*/php */composer update --no-interaction --no-progress --ansi --prefer-lowest --prefer-stable --ignore-platform-reqs --optimize-autoloader'"
 expect "Updating dependencies"
 expect "Generating optimized autoload files"
 expect eof
diff --git a/tests/expect/composer_install_07.exp b/tests/expect/composer_install_07.exp
index 3b2747d..ca2b5b6 100755
--- a/tests/expect/composer_install_07.exp
+++ b/tests/expect/composer_install_07.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "highest" "--ignore-platform-reqs --optimize-autoloader" "" "" "" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer update --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader'"
+expect "::debug::Using the following Composer command: '*/php */composer update --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader'"
 expect "Updating dependencies"
 expect "Generating optimized autoload files"
 expect eof
diff --git a/tests/expect/composer_install_08.exp b/tests/expect/composer_install_08.exp
index fad6e1a..2678767 100755
--- a/tests/expect/composer_install_08.exp
+++ b/tests/expect/composer_install_08.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "locked" "--ignore-platform-reqs --optimize-autoloader" "" "" "" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer install --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader'"
+expect "::debug::Using the following Composer command: '*/php */composer install --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader'"
 expect "Installing dependencies"
 expect "Generating optimized autoload files"
 expect eof
diff --git a/tests/expect/composer_install_09.exp b/tests/expect/composer_install_09.exp
index e7dfdec..4d030f7 100755
--- a/tests/expect/composer_install_09.exp
+++ b/tests/expect/composer_install_09.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "" "" "../fixtures/with-lock-file" "" "" "../fixtures/with-lock-file/composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer install --no-interaction --no-progress --ansi --working-dir ../fixtures/with-lock-file'"
+expect "::debug::Using the following Composer command: '*/php */composer install --no-interaction --no-progress --ansi --working-dir ../fixtures/with-lock-file'"
 expect "Installing dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_10.exp b/tests/expect/composer_install_10.exp
index ab236fa..20324af 100755
--- a/tests/expect/composer_install_10.exp
+++ b/tests/expect/composer_install_10.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "lowest" "" "../fixtures/with-lock-file" "" "" "../fixtures/with-lock-file/composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer update --no-interaction --no-progress --ansi --prefer-lowest --prefer-stable --working-dir ../fixtures/with-lock-file'"
+expect "::debug::Using the following Composer command: '*/php */composer update --no-interaction --no-progress --ansi --prefer-lowest --prefer-stable --working-dir ../fixtures/with-lock-file'"
 expect "Updating dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_11.exp b/tests/expect/composer_install_11.exp
index 07e699b..5db0e60 100755
--- a/tests/expect/composer_install_11.exp
+++ b/tests/expect/composer_install_11.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "highest" "" "../fixtures/with-lock-file" "" "" "../fixtures/with-lock-file/composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer update --no-interaction --no-progress --ansi --working-dir ../fixtures/with-lock-file'"
+expect "::debug::Using the following Composer command: '*/php */composer update --no-interaction --no-progress --ansi --working-dir ../fixtures/with-lock-file'"
 expect "Updating dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_12.exp b/tests/expect/composer_install_12.exp
index d083ca6..35763ec 100755
--- a/tests/expect/composer_install_12.exp
+++ b/tests/expect/composer_install_12.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "locked" "" "../fixtures/with-lock-file" "" "" "../fixtures/with-lock-file/composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer install --no-interaction --no-progress --ansi --working-dir ../fixtures/with-lock-file'"
+expect "::debug::Using the following Composer command: '*/php */composer install --no-interaction --no-progress --ansi --working-dir ../fixtures/with-lock-file'"
 expect "Installing dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_13.exp b/tests/expect/composer_install_13.exp
index 6e21b27..a6f84c4 100755
--- a/tests/expect/composer_install_13.exp
+++ b/tests/expect/composer_install_13.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "" "--ignore-platform-reqs --optimize-autoloader" "../fixtures/with-lock-file" "" "" "../fixtures/with-lock-file/composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer install --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader --working-dir ../fixtures/with-lock-file'"
+expect "::debug::Using the following Composer command: '*/php */composer install --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader --working-dir ../fixtures/with-lock-file'"
 expect "Installing dependencies"
 expect "Generating optimized autoload files"
 expect eof
diff --git a/tests/expect/composer_install_14.exp b/tests/expect/composer_install_14.exp
index 32a2ce1..9fa7d07 100755
--- a/tests/expect/composer_install_14.exp
+++ b/tests/expect/composer_install_14.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "lowest" "--ignore-platform-reqs --optimize-autoloader" "../fixtures/with-lock-file" "" "" "../fixtures/with-lock-file/composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer update --no-interaction --no-progress --ansi --prefer-lowest --prefer-stable --ignore-platform-reqs --optimize-autoloader --working-dir ../fixtures/with-lock-file'"
+expect "::debug::Using the following Composer command: '*/php */composer update --no-interaction --no-progress --ansi --prefer-lowest --prefer-stable --ignore-platform-reqs --optimize-autoloader --working-dir ../fixtures/with-lock-file'"
 expect "Updating dependencies"
 expect "Generating optimized autoload files"
 expect eof
diff --git a/tests/expect/composer_install_15.exp b/tests/expect/composer_install_15.exp
index dab1d81..af1c715 100755
--- a/tests/expect/composer_install_15.exp
+++ b/tests/expect/composer_install_15.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "highest" "--ignore-platform-reqs --optimize-autoloader" "../fixtures/with-lock-file" "" "" "../fixtures/with-lock-file/composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer update --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader --working-dir ../fixtures/with-lock-file'"
+expect "::debug::Using the following Composer command: '*/php */composer update --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader --working-dir ../fixtures/with-lock-file'"
 expect "Updating dependencies"
 expect "Generating optimized autoload files"
 expect eof
diff --git a/tests/expect/composer_install_16.exp b/tests/expect/composer_install_16.exp
index 7143a06..f2bb343 100755
--- a/tests/expect/composer_install_16.exp
+++ b/tests/expect/composer_install_16.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "locked" "--ignore-platform-reqs --optimize-autoloader" "../fixtures/with-lock-file" "" "" "../fixtures/with-lock-file/composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer install --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader --working-dir ../fixtures/with-lock-file'"
+expect "::debug::Using the following Composer command: '*/php */composer install --no-interaction --no-progress --ansi --ignore-platform-reqs --optimize-autoloader --working-dir ../fixtures/with-lock-file'"
 expect "Installing dependencies"
 expect "Generating optimized autoload files"
 expect eof
diff --git a/tests/expect/composer_install_17.exp b/tests/expect/composer_install_17.exp
index 18ff7fc..93cf0bf 100755
--- a/tests/expect/composer_install_17.exp
+++ b/tests/expect/composer_install_17.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "foobar" "" "" "" "" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer install --no-interaction --no-progress --ansi'"
+expect "::debug::Using the following Composer command: '*/php */composer install --no-interaction --no-progress --ansi'"
 expect "Installing dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_18.exp b/tests/expect/composer_install_18.exp
index b862436..77a0440 100755
--- a/tests/expect/composer_install_18.exp
+++ b/tests/expect/composer_install_18.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "" "" "" "" "../fixtures/composer.phar" "composer.lock"
 match_max 100000
 
-expect "::debug::Using the following Composer command: '../fixtures/composer.phar install --no-interaction --no-progress --ansi'"
+expect "::debug::Using the following Composer command: '*/php ../fixtures/composer.phar install --no-interaction --no-progress --ansi'"
 expect "Installing dependencies"
 expect "Generating autoload files"
 expect eof
diff --git a/tests/expect/composer_install_19.exp b/tests/expect/composer_install_19.exp
index ca326de..398c24e 100755
--- a/tests/expect/composer_install_19.exp
+++ b/tests/expect/composer_install_19.exp
@@ -4,7 +4,7 @@ set timeout 3
 spawn ../../bin/composer_install.sh "" "" "../fixtures/no-lock-file" "" "" ""
 match_max 100000
 
-expect "::debug::Using the following Composer command: '*/composer update --no-interaction --no-progress --ansi --working-dir ../fixtures/no-lock-file'"
+expect "::debug::Using the following Composer command: '*/php */composer update --no-interaction --no-progress --ansi --working-dir ../fixtures/no-lock-file'"
 expect "Updating dependencies"
 expect "Writing lock file"
 expect "Generating autoload files"