diff --git a/config/env_config.go b/config/env_config.go
index 3a06f1412a7..156c0472115 100644
--- a/config/env_config.go
+++ b/config/env_config.go
@@ -5,7 +5,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"strconv"
 	"strings"
@@ -29,9 +28,9 @@ const (
 
 	awsSessionTokenEnvVar = "AWS_SESSION_TOKEN"
 
-	awsContainerCredentialsEndpointEnvVar     = "AWS_CONTAINER_CREDENTIALS_FULL_URI"
-	awsContainerCredentialsRelativePathEnvVar = "AWS_CONTAINER_CREDENTIALS_RELATIVE_URI"
-	awsContainerPProviderAuthorizationEnvVar  = "AWS_CONTAINER_AUTHORIZATION_TOKEN"
+	awsContainerCredentialsFullURIEnvVar     = "AWS_CONTAINER_CREDENTIALS_FULL_URI"
+	awsContainerCredentialsRelativeURIEnvVar = "AWS_CONTAINER_CREDENTIALS_RELATIVE_URI"
+	awsContainerAuthorizationTokenEnvVar     = "AWS_CONTAINER_AUTHORIZATION_TOKEN"
 
 	awsRegionEnvVar        = "AWS_REGION"
 	awsDefaultRegionEnvVar = "AWS_DEFAULT_REGION"
@@ -43,9 +42,9 @@ const (
 
 	awsConfigFileEnvVar = "AWS_CONFIG_FILE"
 
-	awsCustomCABundleEnvVar = "AWS_CA_BUNDLE"
+	awsCABundleEnvVar = "AWS_CA_BUNDLE"
 
-	awsWebIdentityTokenFilePathEnvVar = "AWS_WEB_IDENTITY_TOKEN_FILE"
+	awsWebIdentityTokenFileEnvVar = "AWS_WEB_IDENTITY_TOKEN_FILE"
 
 	awsRoleARNEnvVar         = "AWS_ROLE_ARN"
 	awsRoleSessionNameEnvVar = "AWS_ROLE_SESSION_NAME"
@@ -58,31 +57,31 @@ const (
 
 	awsEc2MetadataServiceEndpointEnvVar = "AWS_EC2_METADATA_SERVICE_ENDPOINT"
 
-	awsEc2MetadataDisabled         = "AWS_EC2_METADATA_DISABLED"
+	awsEc2MetadataDisabledEnvVar   = "AWS_EC2_METADATA_DISABLED"
 	awsEc2MetadataV1DisabledEnvVar = "AWS_EC2_METADATA_V1_DISABLED"
 
-	awsS3DisableMultiRegionAccessPointEnvVar = "AWS_S3_DISABLE_MULTIREGION_ACCESS_POINTS"
+	awsS3DisableMultiRegionAccessPointsEnvVar = "AWS_S3_DISABLE_MULTIREGION_ACCESS_POINTS"
 
-	awsUseDualStackEndpoint = "AWS_USE_DUALSTACK_ENDPOINT"
+	awsUseDualStackEndpointEnvVar = "AWS_USE_DUALSTACK_ENDPOINT"
 
-	awsUseFIPSEndpoint = "AWS_USE_FIPS_ENDPOINT"
+	awsUseFIPSEndpointEnvVar = "AWS_USE_FIPS_ENDPOINT"
 
-	awsDefaultMode = "AWS_DEFAULTS_MODE"
+	awsDefaultsModeEnvVar = "AWS_DEFAULTS_MODE"
 
-	awsRetryMaxAttempts = "AWS_MAX_ATTEMPTS"
-	awsRetryMode        = "AWS_RETRY_MODE"
-	awsSdkAppID         = "AWS_SDK_UA_APP_ID"
+	awsMaxAttemptsEnvVar = "AWS_MAX_ATTEMPTS"
+	awsRetryModeEnvVar   = "AWS_RETRY_MODE"
+	awsSdkUaAppIDEnvVar  = "AWS_SDK_UA_APP_ID"
 
-	awsIgnoreConfiguredEndpoints = "AWS_IGNORE_CONFIGURED_ENDPOINT_URLS"
-	awsEndpointURL               = "AWS_ENDPOINT_URL"
+	awsIgnoreConfiguredEndpointURLEnvVar = "AWS_IGNORE_CONFIGURED_ENDPOINT_URLS"
+	awsEndpointURLEnvVar                 = "AWS_ENDPOINT_URL"
 
-	awsDisableRequestCompression      = "AWS_DISABLE_REQUEST_COMPRESSION"
-	awsRequestMinCompressionSizeBytes = "AWS_REQUEST_MIN_COMPRESSION_SIZE_BYTES"
+	awsDisableRequestCompressionEnvVar      = "AWS_DISABLE_REQUEST_COMPRESSION"
+	awsRequestMinCompressionSizeBytesEnvVar = "AWS_REQUEST_MIN_COMPRESSION_SIZE_BYTES"
 
-	awsS3DisableExpressSessionAuthEnv = "AWS_S3_DISABLE_EXPRESS_SESSION_AUTH"
+	awsS3DisableExpressSessionAuthEnvVar = "AWS_S3_DISABLE_EXPRESS_SESSION_AUTH"
 
-	awsAccountIDEnv             = "AWS_ACCOUNT_ID"
-	awsAccountIDEndpointModeEnv = "AWS_ACCOUNT_ID_ENDPOINT_MODE"
+	awsAccountIDEnvVar             = "AWS_ACCOUNT_ID"
+	awsAccountIDEndpointModeEnvVar = "AWS_ACCOUNT_ID_ENDPOINT_MODE"
 )
 
 var (
@@ -315,14 +314,14 @@ func NewEnvConfig() (EnvConfig, error) {
 	setStringFromEnvVal(&creds.AccessKeyID, credAccessEnvKeys)
 	setStringFromEnvVal(&creds.SecretAccessKey, credSecretEnvKeys)
 	if creds.HasKeys() {
-		creds.AccountID = os.Getenv(awsAccountIDEnv)
+		creds.AccountID = os.Getenv(awsAccountIDEnvVar)
 		creds.SessionToken = os.Getenv(awsSessionTokenEnvVar)
 		cfg.Credentials = creds
 	}
 
-	cfg.ContainerCredentialsEndpoint = os.Getenv(awsContainerCredentialsEndpointEnvVar)
-	cfg.ContainerCredentialsRelativePath = os.Getenv(awsContainerCredentialsRelativePathEnvVar)
-	cfg.ContainerAuthorizationToken = os.Getenv(awsContainerPProviderAuthorizationEnvVar)
+	cfg.ContainerCredentialsEndpoint = os.Getenv(awsContainerCredentialsFullURIEnvVar)
+	cfg.ContainerCredentialsRelativePath = os.Getenv(awsContainerCredentialsRelativeURIEnvVar)
+	cfg.ContainerAuthorizationToken = os.Getenv(awsContainerAuthorizationTokenEnvVar)
 
 	setStringFromEnvVal(&cfg.Region, regionEnvKeys)
 	setStringFromEnvVal(&cfg.SharedConfigProfile, profileEnvKeys)
@@ -330,19 +329,19 @@ func NewEnvConfig() (EnvConfig, error) {
 	cfg.SharedCredentialsFile = os.Getenv(awsSharedCredentialsFileEnvVar)
 	cfg.SharedConfigFile = os.Getenv(awsConfigFileEnvVar)
 
-	cfg.CustomCABundle = os.Getenv(awsCustomCABundleEnvVar)
+	cfg.CustomCABundle = os.Getenv(awsCABundleEnvVar)
 
-	cfg.WebIdentityTokenFilePath = os.Getenv(awsWebIdentityTokenFilePathEnvVar)
+	cfg.WebIdentityTokenFilePath = os.Getenv(awsWebIdentityTokenFileEnvVar)
 
 	cfg.RoleARN = os.Getenv(awsRoleARNEnvVar)
 	cfg.RoleSessionName = os.Getenv(awsRoleSessionNameEnvVar)
 
-	cfg.AppID = os.Getenv(awsSdkAppID)
+	cfg.AppID = os.Getenv(awsSdkUaAppIDEnvVar)
 
-	if err := setBoolPtrFromEnvVal(&cfg.DisableRequestCompression, []string{awsDisableRequestCompression}); err != nil {
+	if err := setBoolPtrFromEnvVal(&cfg.DisableRequestCompression, []string{awsDisableRequestCompressionEnvVar}); err != nil {
 		return cfg, err
 	}
-	if err := setInt64PtrFromEnvVal(&cfg.RequestMinCompressSizeBytes, []string{awsRequestMinCompressionSizeBytes}, smithyrequestcompression.MaxRequestMinCompressSizeBytes); err != nil {
+	if err := setInt64PtrFromEnvVal(&cfg.RequestMinCompressSizeBytes, []string{awsRequestMinCompressionSizeBytesEnvVar}, smithyrequestcompression.MaxRequestMinCompressSizeBytes); err != nil {
 		return cfg, err
 	}
 
@@ -354,7 +353,7 @@ func NewEnvConfig() (EnvConfig, error) {
 		return cfg, err
 	}
 
-	setEC2IMDSClientEnableState(&cfg.EC2IMDSClientEnableState, []string{awsEc2MetadataDisabled})
+	setEC2IMDSClientEnableState(&cfg.EC2IMDSClientEnableState, []string{awsEc2MetadataDisabledEnvVar})
 	if err := setEC2IMDSEndpointMode(&cfg.EC2IMDSEndpointMode, []string{awsEc2MetadataServiceEndpointModeEnvVar}); err != nil {
 		return cfg, err
 	}
@@ -363,40 +362,40 @@ func NewEnvConfig() (EnvConfig, error) {
 		return cfg, err
 	}
 
-	if err := setBoolPtrFromEnvVal(&cfg.S3DisableMultiRegionAccessPoints, []string{awsS3DisableMultiRegionAccessPointEnvVar}); err != nil {
+	if err := setBoolPtrFromEnvVal(&cfg.S3DisableMultiRegionAccessPoints, []string{awsS3DisableMultiRegionAccessPointsEnvVar}); err != nil {
 		return cfg, err
 	}
 
-	if err := setUseDualStackEndpointFromEnvVal(&cfg.UseDualStackEndpoint, []string{awsUseDualStackEndpoint}); err != nil {
+	if err := setUseDualStackEndpointFromEnvVal(&cfg.UseDualStackEndpoint, []string{awsUseDualStackEndpointEnvVar}); err != nil {
 		return cfg, err
 	}
 
-	if err := setUseFIPSEndpointFromEnvVal(&cfg.UseFIPSEndpoint, []string{awsUseFIPSEndpoint}); err != nil {
+	if err := setUseFIPSEndpointFromEnvVal(&cfg.UseFIPSEndpoint, []string{awsUseFIPSEndpointEnvVar}); err != nil {
 		return cfg, err
 	}
 
-	if err := setDefaultsModeFromEnvVal(&cfg.DefaultsMode, []string{awsDefaultMode}); err != nil {
+	if err := setDefaultsModeFromEnvVal(&cfg.DefaultsMode, []string{awsDefaultsModeEnvVar}); err != nil {
 		return cfg, err
 	}
 
-	if err := setIntFromEnvVal(&cfg.RetryMaxAttempts, []string{awsRetryMaxAttempts}); err != nil {
+	if err := setIntFromEnvVal(&cfg.RetryMaxAttempts, []string{awsMaxAttemptsEnvVar}); err != nil {
 		return cfg, err
 	}
-	if err := setRetryModeFromEnvVal(&cfg.RetryMode, []string{awsRetryMode}); err != nil {
+	if err := setRetryModeFromEnvVal(&cfg.RetryMode, []string{awsRetryModeEnvVar}); err != nil {
 		return cfg, err
 	}
 
-	setStringFromEnvVal(&cfg.BaseEndpoint, []string{awsEndpointURL})
+	setStringFromEnvVal(&cfg.BaseEndpoint, []string{awsEndpointURLEnvVar})
 
-	if err := setBoolPtrFromEnvVal(&cfg.IgnoreConfiguredEndpoints, []string{awsIgnoreConfiguredEndpoints}); err != nil {
+	if err := setBoolPtrFromEnvVal(&cfg.IgnoreConfiguredEndpoints, []string{awsIgnoreConfiguredEndpointURLEnvVar}); err != nil {
 		return cfg, err
 	}
 
-	if err := setBoolPtrFromEnvVal(&cfg.S3DisableExpressAuth, []string{awsS3DisableExpressSessionAuthEnv}); err != nil {
+	if err := setBoolPtrFromEnvVal(&cfg.S3DisableExpressAuth, []string{awsS3DisableExpressSessionAuthEnvVar}); err != nil {
 		return cfg, err
 	}
 
-	if err := setAIDEndPointModeFromEnvVal(&cfg.AccountIDEndpointMode, []string{awsAccountIDEndpointModeEnv}); err != nil {
+	if err := setAIDEndPointModeFromEnvVal(&cfg.AccountIDEndpointMode, []string{awsAccountIDEndpointModeEnvVar}); err != nil {
 		return cfg, err
 	}
 
@@ -584,7 +583,7 @@ func (c EnvConfig) getCustomCABundle(context.Context) (io.Reader, bool, error) {
 		return nil, false, nil
 	}
 
-	b, err := ioutil.ReadFile(c.CustomCABundle)
+	b, err := os.ReadFile(c.CustomCABundle)
 	if err != nil {
 		return nil, false, err
 	}
@@ -608,7 +607,7 @@ func (c EnvConfig) getBaseEndpoint(context.Context) (string, bool, error) {
 // GetServiceBaseEndpoint is used to retrieve a normalized SDK ID for use
 // with configured endpoints.
 func (c EnvConfig) GetServiceBaseEndpoint(ctx context.Context, sdkID string) (string, bool, error) {
-	if endpt := os.Getenv(fmt.Sprintf("%s_%s", awsEndpointURL, normalizeEnv(sdkID))); endpt != "" {
+	if endpt := os.Getenv(fmt.Sprintf("%s_%s", awsEndpointURLEnvVar, normalizeEnv(sdkID))); endpt != "" {
 		return endpt, true, nil
 	}
 	return "", false, nil