diff --git a/crates/formatter/tests/cases/fully_qualified_global_constant/after.php b/crates/formatter/tests/cases/fully_qualified_global_constant/after.php
new file mode 100644
index 00000000..b060019e
--- /dev/null
+++ b/crates/formatter/tests/cases/fully_qualified_global_constant/after.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Invalid;
+
+use const PHP_VERSION;
+
+$foo = PHP_VERSION;
diff --git a/crates/formatter/tests/cases/fully_qualified_global_constant/before.php b/crates/formatter/tests/cases/fully_qualified_global_constant/before.php
new file mode 100644
index 00000000..f2b804f7
--- /dev/null
+++ b/crates/formatter/tests/cases/fully_qualified_global_constant/before.php
@@ -0,0 +1,7 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Invalid;
+
+$foo = \PHP_VERSION;
diff --git a/crates/formatter/tests/cases/fully_qualified_global_constant/settings.inc b/crates/formatter/tests/cases/fully_qualified_global_constant/settings.inc
new file mode 100644
index 00000000..f9c803c2
--- /dev/null
+++ b/crates/formatter/tests/cases/fully_qualified_global_constant/settings.inc
@@ -0,0 +1 @@
+FormatSettings::default()
diff --git a/crates/formatter/tests/cases/fully_qualified_global_function/after.php b/crates/formatter/tests/cases/fully_qualified_global_function/after.php
new file mode 100644
index 00000000..3dbfc636
--- /dev/null
+++ b/crates/formatter/tests/cases/fully_qualified_global_function/after.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Invalid;
+
+use function strlen;
+
+$foo = strlen('bar');
diff --git a/crates/formatter/tests/cases/fully_qualified_global_function/before.php b/crates/formatter/tests/cases/fully_qualified_global_function/before.php
new file mode 100644
index 00000000..ad7a9cb0
--- /dev/null
+++ b/crates/formatter/tests/cases/fully_qualified_global_function/before.php
@@ -0,0 +1,7 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Invalid;
+
+$foo = \strlen('bar');
diff --git a/crates/formatter/tests/cases/fully_qualified_global_function/settings.inc b/crates/formatter/tests/cases/fully_qualified_global_function/settings.inc
new file mode 100644
index 00000000..f9c803c2
--- /dev/null
+++ b/crates/formatter/tests/cases/fully_qualified_global_function/settings.inc
@@ -0,0 +1 @@
+FormatSettings::default()
diff --git a/crates/formatter/tests/cases/global_constant_not_imported/after.php b/crates/formatter/tests/cases/global_constant_not_imported/after.php
new file mode 100644
index 00000000..b060019e
--- /dev/null
+++ b/crates/formatter/tests/cases/global_constant_not_imported/after.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Invalid;
+
+use const PHP_VERSION;
+
+$foo = PHP_VERSION;
diff --git a/crates/formatter/tests/cases/global_constant_not_imported/before.php b/crates/formatter/tests/cases/global_constant_not_imported/before.php
new file mode 100644
index 00000000..aef9dd60
--- /dev/null
+++ b/crates/formatter/tests/cases/global_constant_not_imported/before.php
@@ -0,0 +1,7 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Invalid;
+
+$foo = PHP_VERSION;
diff --git a/crates/formatter/tests/cases/global_constant_not_imported/settings.inc b/crates/formatter/tests/cases/global_constant_not_imported/settings.inc
new file mode 100644
index 00000000..f9c803c2
--- /dev/null
+++ b/crates/formatter/tests/cases/global_constant_not_imported/settings.inc
@@ -0,0 +1 @@
+FormatSettings::default()
diff --git a/crates/formatter/tests/cases/global_function_not_imported/after.php b/crates/formatter/tests/cases/global_function_not_imported/after.php
new file mode 100644
index 00000000..3dbfc636
--- /dev/null
+++ b/crates/formatter/tests/cases/global_function_not_imported/after.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Invalid;
+
+use function strlen;
+
+$foo = strlen('bar');
diff --git a/crates/formatter/tests/cases/global_function_not_imported/before.php b/crates/formatter/tests/cases/global_function_not_imported/before.php
new file mode 100644
index 00000000..6caba145
--- /dev/null
+++ b/crates/formatter/tests/cases/global_function_not_imported/before.php
@@ -0,0 +1,7 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Invalid;
+
+$foo = strlen('bar');
diff --git a/crates/formatter/tests/cases/global_function_not_imported/settings.inc b/crates/formatter/tests/cases/global_function_not_imported/settings.inc
new file mode 100644
index 00000000..f9c803c2
--- /dev/null
+++ b/crates/formatter/tests/cases/global_function_not_imported/settings.inc
@@ -0,0 +1 @@
+FormatSettings::default()
diff --git a/crates/formatter/tests/mod.rs b/crates/formatter/tests/mod.rs
index b70e9c33..91ea1075 100644
--- a/crates/formatter/tests/mod.rs
+++ b/crates/formatter/tests/mod.rs
@@ -237,6 +237,10 @@ test_case!(idempotent_chain_with_array);
 test_case!(match_idempotency);
 test_case!(heredoc_indentation);
 test_case!(heredoc_indentation_disabled);
+test_case!(fully_qualified_global_constant);
+test_case!(fully_qualified_global_function);
+test_case!(global_constant_not_imported);
+test_case!(global_function_not_imported);
 
 // A special test case for regressions in the Psl codebase
 test_case!(psl_regressions);