diff --git a/7.4/Dockerfile b/7.4/Dockerfile
index 72a77e4..b3a6bb8 100644
--- a/7.4/Dockerfile
+++ b/7.4/Dockerfile
@@ -42,7 +42,8 @@ RUN chmod +x /usr/local/bin/install-php-extensions && \
     pdo_pgsql \
     pcntl \
     soap \
-    zip
+    zip \
+    pcov-stable
 
 # Add local and global vendor bin to PATH.
 ENV PATH ./vendor/bin:/composer/vendor/bin:/root/.composer/vendor/bin:/usr/local/bin:$PATH
diff --git a/8.0/Dockerfile b/8.0/Dockerfile
index 0ba162c..4d67065 100644
--- a/8.0/Dockerfile
+++ b/8.0/Dockerfile
@@ -42,7 +42,8 @@ RUN chmod +x /usr/local/bin/install-php-extensions && \
     pdo_pgsql \
     pcntl \
     soap \
-    zip
+    zip \
+    pcov-stable
 
 # Add local and global vendor bin to PATH.
 ENV PATH ./vendor/bin:/composer/vendor/bin:/root/.composer/vendor/bin:/usr/local/bin:$PATH
diff --git a/8.1/Dockerfile b/8.1/Dockerfile
index 136b999..606eec4 100644
--- a/8.1/Dockerfile
+++ b/8.1/Dockerfile
@@ -42,7 +42,8 @@ RUN chmod +x /usr/local/bin/install-php-extensions && \
     pdo_pgsql \
     pcntl \
     soap \
-    zip
+    zip \
+    pcov-stable
 
 # Add local and global vendor bin to PATH.
 ENV PATH ./vendor/bin:/composer/vendor/bin:/root/.composer/vendor/bin:/usr/local/bin:$PATH