diff --git a/features/bootstrap/Aws/Test/Integ/ClientSideMonitoringContext.php b/features/bootstrap/Aws/Test/Integ/ClientSideMonitoringContext.php
index 34e1502770..398ba822da 100644
--- a/features/bootstrap/Aws/Test/Integ/ClientSideMonitoringContext.php
+++ b/features/bootstrap/Aws/Test/Integ/ClientSideMonitoringContext.php
@@ -21,6 +21,8 @@
 use PHPUnit\Framework\Assert;
 use Yoast\PHPUnitPolyfills\TestCases\TestCase;
 
+use function Aws\getenv;
+
 class ClientSideMonitoringContext extends TestCase
     implements Context, SnippetAcceptingContext
 {
diff --git a/features/bootstrap/Aws/Test/Integ/IntegUtils.php b/features/bootstrap/Aws/Test/Integ/IntegUtils.php
index 46bdd1e6f0..2d2c84a187 100644
--- a/features/bootstrap/Aws/Test/Integ/IntegUtils.php
+++ b/features/bootstrap/Aws/Test/Integ/IntegUtils.php
@@ -1,6 +1,8 @@
 <?php
 namespace Aws\Test\Integ;
 
+use function Aws\getenv;
+
 trait IntegUtils
 {
     private static $originalCsmEnabled;
diff --git a/src/AbstractConfigurationProvider.php b/src/AbstractConfigurationProvider.php
index 78a5cdadaf..5cf3fb10b6 100644
--- a/src/AbstractConfigurationProvider.php
+++ b/src/AbstractConfigurationProvider.php
@@ -3,6 +3,8 @@
 
 use GuzzleHttp\Promise;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that returns a promise that is
  * fulfilled with a configuration object. This class provides base functionality
diff --git a/src/ClientResolver.php b/src/ClientResolver.php
index 2414f0aea2..ed6cd3875d 100644
--- a/src/ClientResolver.php
+++ b/src/ClientResolver.php
@@ -36,6 +36,8 @@
 use InvalidArgumentException as IAE;
 use Psr\Http\Message\RequestInterface;
 
+use function Aws\getenv;
+
 /**
  * @internal Resolves a hash of client arguments to construct a client.
  */
diff --git a/src/ClientSideMonitoring/ConfigurationProvider.php b/src/ClientSideMonitoring/ConfigurationProvider.php
index b83de70f84..9ac125029e 100644
--- a/src/ClientSideMonitoring/ConfigurationProvider.php
+++ b/src/ClientSideMonitoring/ConfigurationProvider.php
@@ -8,6 +8,8 @@
 use GuzzleHttp\Promise;
 use GuzzleHttp\Promise\PromiseInterface;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that accepts no arguments and returns
  * a promise that is fulfilled with a {@see \Aws\ClientSideMonitoring\ConfigurationInterface}
diff --git a/src/Configuration/ConfigurationResolver.php b/src/Configuration/ConfigurationResolver.php
index a08595a75d..3383ca5267 100644
--- a/src/Configuration/ConfigurationResolver.php
+++ b/src/Configuration/ConfigurationResolver.php
@@ -2,6 +2,8 @@
 
 namespace Aws\Configuration;
 
+use function Aws\getenv;
+
 class ConfigurationResolver
 {
     const ENV_PROFILE = 'AWS_PROFILE';
diff --git a/src/Credentials/AssumeRoleWithWebIdentityCredentialProvider.php b/src/Credentials/AssumeRoleWithWebIdentityCredentialProvider.php
index 7e8057e9dd..c75c386a8a 100644
--- a/src/Credentials/AssumeRoleWithWebIdentityCredentialProvider.php
+++ b/src/Credentials/AssumeRoleWithWebIdentityCredentialProvider.php
@@ -7,6 +7,8 @@
 use Aws\Sts\StsClient;
 use GuzzleHttp\Promise;
 
+use function Aws\getenv;
+
 /**
  * Credential provider that provides credentials via assuming a role with a web identity
  * More Information, see: https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-sts-2011-06-15.html#assumerolewithwebidentity
diff --git a/src/Credentials/CredentialProvider.php b/src/Credentials/CredentialProvider.php
index 1647fe0da9..4332c896ce 100644
--- a/src/Credentials/CredentialProvider.php
+++ b/src/Credentials/CredentialProvider.php
@@ -7,6 +7,8 @@
 use Aws\Exception\CredentialsException;
 use Aws\Sts\StsClient;
 use GuzzleHttp\Promise;
+
+use function Aws\getenv;
 /**
  * Credential providers are functions that accept no arguments and return a
  * promise that is fulfilled with an {@see \Aws\Credentials\CredentialsInterface}
diff --git a/src/Credentials/EcsCredentialProvider.php b/src/Credentials/EcsCredentialProvider.php
index 18c210547c..7325abf93d 100644
--- a/src/Credentials/EcsCredentialProvider.php
+++ b/src/Credentials/EcsCredentialProvider.php
@@ -7,6 +7,8 @@
 use GuzzleHttp\Promise\PromiseInterface;
 use Psr\Http\Message\ResponseInterface;
 
+use function Aws\getenv;
+
 /**
  * Credential provider that fetches container credentials with GET request.
  * container environment variables are used in constructing request URI.
diff --git a/src/Credentials/InstanceProfileProvider.php b/src/Credentials/InstanceProfileProvider.php
index e820a04cba..f5b85e259f 100644
--- a/src/Credentials/InstanceProfileProvider.php
+++ b/src/Credentials/InstanceProfileProvider.php
@@ -11,6 +11,8 @@
 use GuzzleHttp\Promise\PromiseInterface;
 use Psr\Http\Message\ResponseInterface;
 
+use function Aws\getenv;
+
 /**
  * Credential provider that provides credentials from the EC2 metadata service.
  */
diff --git a/src/DefaultsMode/ConfigurationProvider.php b/src/DefaultsMode/ConfigurationProvider.php
index 86229aca4c..de4acdb270 100644
--- a/src/DefaultsMode/ConfigurationProvider.php
+++ b/src/DefaultsMode/ConfigurationProvider.php
@@ -8,6 +8,8 @@
 use GuzzleHttp\Promise;
 use GuzzleHttp\Promise\PromiseInterface;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that returns a promise that is
  * fulfilled with a {@see \Aws\DefaultsMode\ConfigurationInterface}
diff --git a/src/Endpoint/UseDualstackEndpoint/ConfigurationProvider.php b/src/Endpoint/UseDualstackEndpoint/ConfigurationProvider.php
index b7d8e531a6..d513fa2eb8 100644
--- a/src/Endpoint/UseDualstackEndpoint/ConfigurationProvider.php
+++ b/src/Endpoint/UseDualstackEndpoint/ConfigurationProvider.php
@@ -7,6 +7,8 @@
 use Aws\Endpoint\UseDualstackEndpoint\Exception\ConfigurationException;
 use GuzzleHttp\Promise;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that returns a promise that is
  * fulfilled with a {@see \Aws\Endpoint\UseDualstackEndpoint\onfigurationInterface}
diff --git a/src/Endpoint/UseFipsEndpoint/ConfigurationProvider.php b/src/Endpoint/UseFipsEndpoint/ConfigurationProvider.php
index 0b344488aa..20d8cb086d 100644
--- a/src/Endpoint/UseFipsEndpoint/ConfigurationProvider.php
+++ b/src/Endpoint/UseFipsEndpoint/ConfigurationProvider.php
@@ -7,6 +7,8 @@
 use Aws\Endpoint\UseFipsEndpoint\Exception\ConfigurationException;
 use GuzzleHttp\Promise;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that returns a promise that is
  * fulfilled with a {@see \Aws\Endpoint\UseFipsEndpoint\onfigurationInterface}
diff --git a/src/EndpointDiscovery/ConfigurationProvider.php b/src/EndpointDiscovery/ConfigurationProvider.php
index 77404a81d0..7331a32383 100644
--- a/src/EndpointDiscovery/ConfigurationProvider.php
+++ b/src/EndpointDiscovery/ConfigurationProvider.php
@@ -8,6 +8,8 @@
 use GuzzleHttp\Promise;
 use GuzzleHttp\Promise\PromiseInterface;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that returns a promise that is
  * fulfilled with a {@see \Aws\EndpointDiscovery\ConfigurationInterface}
diff --git a/src/Middleware.php b/src/Middleware.php
index cb627efc04..7bc00f15ca 100644
--- a/src/Middleware.php
+++ b/src/Middleware.php
@@ -14,6 +14,8 @@
 use GuzzleHttp\Psr7\LazyOpenStream;
 use Psr\Http\Message\RequestInterface;
 
+use function Aws\getenv;
+
 final class Middleware
 {
     /**
diff --git a/src/Retry/ConfigurationProvider.php b/src/Retry/ConfigurationProvider.php
index db641f2204..a42b41e86b 100644
--- a/src/Retry/ConfigurationProvider.php
+++ b/src/Retry/ConfigurationProvider.php
@@ -8,6 +8,8 @@
 use GuzzleHttp\Promise;
 use GuzzleHttp\Promise\PromiseInterface;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that returns a promise that is
  * fulfilled with a {@see \Aws\Retry\ConfigurationInterface}
diff --git a/src/S3/RegionalEndpoint/ConfigurationProvider.php b/src/S3/RegionalEndpoint/ConfigurationProvider.php
index 19b715137a..e155a6fdc1 100644
--- a/src/S3/RegionalEndpoint/ConfigurationProvider.php
+++ b/src/S3/RegionalEndpoint/ConfigurationProvider.php
@@ -7,6 +7,8 @@
 use Aws\S3\RegionalEndpoint\Exception\ConfigurationException;
 use GuzzleHttp\Promise;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that returns a promise that is
  * fulfilled with a {@see \Aws\S3\RegionalEndpoint\ConfigurationInterface}
diff --git a/src/S3/UseArnRegion/ConfigurationProvider.php b/src/S3/UseArnRegion/ConfigurationProvider.php
index b9ced4e3cc..23399c9818 100644
--- a/src/S3/UseArnRegion/ConfigurationProvider.php
+++ b/src/S3/UseArnRegion/ConfigurationProvider.php
@@ -7,6 +7,8 @@
 use Aws\S3\UseArnRegion\Exception\ConfigurationException;
 use GuzzleHttp\Promise;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that returns a promise that is
  * fulfilled with a {@see \Aws\S3\UseArnRegion\ConfigurationInterface}
diff --git a/src/Sts/RegionalEndpoints/ConfigurationProvider.php b/src/Sts/RegionalEndpoints/ConfigurationProvider.php
index 1720980240..85b28b1bb3 100644
--- a/src/Sts/RegionalEndpoints/ConfigurationProvider.php
+++ b/src/Sts/RegionalEndpoints/ConfigurationProvider.php
@@ -8,6 +8,8 @@
 use GuzzleHttp\Promise;
 use GuzzleHttp\Promise\PromiseInterface;
 
+use function Aws\getenv;
+
 /**
  * A configuration provider is a function that returns a promise that is
  * fulfilled with a {@see \Aws\Sts\RegionalEndpoints\ConfigurationInterface}
diff --git a/src/Token/ParsesIniTrait.php b/src/Token/ParsesIniTrait.php
index b96a6d97bc..ca7cb5d97d 100644
--- a/src/Token/ParsesIniTrait.php
+++ b/src/Token/ParsesIniTrait.php
@@ -1,6 +1,8 @@
 <?php
 namespace Aws\Token;
 
+use function Aws\getenv;
+
 trait ParsesIniTrait
 {
     /**
diff --git a/src/Token/SsoTokenProvider.php b/src/Token/SsoTokenProvider.php
index 83a0e2c288..b3a8df976c 100644
--- a/src/Token/SsoTokenProvider.php
+++ b/src/Token/SsoTokenProvider.php
@@ -4,6 +4,8 @@
 use Aws\Exception\TokenException;
 use GuzzleHttp\Promise;
 
+use function Aws\getenv;
+
 /**
  * Token that comes from the SSO provider
  */
diff --git a/src/Token/TokenProvider.php b/src/Token/TokenProvider.php
index 1d7014c888..1ee71564ae 100644
--- a/src/Token/TokenProvider.php
+++ b/src/Token/TokenProvider.php
@@ -7,6 +7,8 @@
 use Aws\Exception\TokenException;
 use GuzzleHttp\Promise;
 
+use function Aws\getenv;
+
 /**
  * Token providers are functions that accept no arguments and return a
  * promise that is fulfilled with an {@see \Aws\Token\TokenInterface}
diff --git a/src/functions.php b/src/functions.php
index 4533728021..60ed3a8310 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -603,3 +603,11 @@ function strip_fips_pseudo_regions($region)
     return str_replace(['fips-', '-fips'], ['', ''], $region);
 }
 
+/** @return string|false */
+function getenv(string $name)
+{
+    $out = \getenv($name);
+
+    return $out === false ? ($_ENV[$name] ?? false) : $out;
+}
+
diff --git a/tests/FunctionsTest.php b/tests/FunctionsTest.php
index f430f10272..cb8358f0a4 100644
--- a/tests/FunctionsTest.php
+++ b/tests/FunctionsTest.php
@@ -516,4 +516,13 @@ public function getIniFileServiceTestCases()
             ]
         ];
     }
+
+    /**
+     * @covers Aws\getenv()
+     */
+    public function testgetenv()
+    {
+        $this->assertEquals(false, Aws\getenv('FOO'));
+        $this->assertEquals($_ENV['FOO'] = 'bar', Aws\getenv('FOO'));
+    }
 }