diff --git a/src/Report/Clover.php b/src/Report/Clover.php
index fa8dbcd00..d80ab4dee 100644
--- a/src/Report/Clover.php
+++ b/src/Report/Clover.php
@@ -16,6 +16,7 @@
 use function ksort;
 use function max;
 use function range;
+use function strpos;
 use function time;
 use DOMDocument;
 use SebastianBergmann\CodeCoverage\CodeCoverage;
diff --git a/src/Report/Cobertura.php b/src/Report/Cobertura.php
index 171064cd1..ead31b466 100644
--- a/src/Report/Cobertura.php
+++ b/src/Report/Cobertura.php
@@ -16,6 +16,7 @@
 use function preg_match;
 use function range;
 use function str_replace;
+use function strpos;
 use function time;
 use DOMImplementation;
 use SebastianBergmann\CodeCoverage\CodeCoverage;
diff --git a/src/Report/Crap4j.php b/src/Report/Crap4j.php
index 75687e9fc..2d91567a0 100644
--- a/src/Report/Crap4j.php
+++ b/src/Report/Crap4j.php
@@ -15,6 +15,7 @@
 use function htmlspecialchars;
 use function is_string;
 use function round;
+use function strpos;
 use DOMDocument;
 use SebastianBergmann\CodeCoverage\CodeCoverage;
 use SebastianBergmann\CodeCoverage\Driver\WriteOperationFailedException;
diff --git a/src/Report/PHP.php b/src/Report/PHP.php
index 3ec388536..2058fb39a 100644
--- a/src/Report/PHP.php
+++ b/src/Report/PHP.php
@@ -12,6 +12,7 @@
 use function dirname;
 use function file_put_contents;
 use function serialize;
+use function strpos;
 use SebastianBergmann\CodeCoverage\CodeCoverage;
 use SebastianBergmann\CodeCoverage\Driver\WriteOperationFailedException;
 use SebastianBergmann\CodeCoverage\Util\Filesystem;