diff --git a/php-unit-test/7.2/Dockerfile b/php-unit-test/7.2/Dockerfile
index 3f5705d0481a70a9a12c15125ec7814150a8302a..4615de0463273b30e5284b4b489ab4ed1b06cd80 100644
--- a/php-unit-test/7.2/Dockerfile
+++ b/php-unit-test/7.2/Dockerfile
@@ -14,7 +14,7 @@ LABEL org.label-schema.build-date=$BUILD_DATE \
 
 RUN apk add --no-cache bash nodejs nodejs-npm $PHPIZE_DEPS \
     && pecl channel-update pecl.php.net \
-    && pecl install xdebug redis \
+    && pecl install xdebug-3.1.6 redis \
     && docker-php-ext-enable xdebug redis \
     && apk del --no-cache $PHPIZE_DEPS
 RUN curl -o /usr/local/bin/composer https://getcomposer.org/composer.phar \
diff --git a/php-unit-test/7.3/Dockerfile b/php-unit-test/7.3/Dockerfile
index 23d6386c1d91210160b3504a464daec73eda2901..1e7a5e533fdbf1931025bb35673ba5c6fa9ade5f 100644
--- a/php-unit-test/7.3/Dockerfile
+++ b/php-unit-test/7.3/Dockerfile
@@ -15,7 +15,7 @@ LABEL org.label-schema.build-date=$BUILD_DATE \
 RUN export BUILD_DEPS="bzip2-dev icu-dev libpng-dev libzip-dev openldap-dev" \
     && apk add --no-cache bash nodejs nodejs-npm $PHPIZE_DEPS $BUILD_DEPS \
     && pecl channel-update pecl.php.net \
-    && pecl install xdebug redis \
+    && pecl install xdebug-3.1.6 redis \
     && docker-php-ext-install bz2 gd intl ldap mysqli pdo_mysql zip \
     && docker-php-ext-enable xdebug redis \
     && apk del --no-cache $PHPIZE_DEPS
diff --git a/php-unit-test/7.4/Dockerfile b/php-unit-test/7.4/Dockerfile
index e547b9ec75680b2b030f54ce6e101638edd91006..80c63c587bc775c765ade4e12248f28ac400b30f 100644
--- a/php-unit-test/7.4/Dockerfile
+++ b/php-unit-test/7.4/Dockerfile
@@ -15,7 +15,7 @@ LABEL org.label-schema.build-date=$BUILD_DATE \
 RUN export BUILD_DEPS="bzip2-dev icu-dev libpng-dev libzip-dev openldap-dev" \
     && apk add --no-cache bash nodejs nodejs-npm $PHPIZE_DEPS $BUILD_DEPS \
     && pecl channel-update pecl.php.net \
-    && pecl install xdebug redis \
+    && pecl install xdebug-3.1.6 redis \
     && docker-php-ext-install bz2 gd intl ldap mysqli pdo_mysql zip \
     && docker-php-ext-enable xdebug redis \
     && apk del --no-cache $PHPIZE_DEPS