diff --git a/aws/session/shared_config.go b/aws/session/shared_config.go
index f3ce8183dd9..2945185b0be 100644
--- a/aws/session/shared_config.go
+++ b/aws/session/shared_config.go
@@ -349,7 +349,7 @@ func (cfg *sharedConfig) setFromIniFiles(profiles map[string]struct{}, profile s
 	if cfg.hasSSOTokenProviderConfiguration() {
 		skippedFiles = 0
 		for _, f := range files {
-			section, ok := f.IniData.GetSection(fmt.Sprintf(ssoSectionPrefix + strings.TrimSpace(cfg.SSOSessionName)))
+			section, ok := f.IniData.GetSection(ssoSectionPrefix + strings.TrimSpace(cfg.SSOSessionName))
 			if ok {
 				var ssoSession ssoSession
 				ssoSession.setFromIniSection(section)
diff --git a/awstesting/assert.go b/awstesting/assert.go
index 8ca3a425081..750aaf282e2 100644
--- a/awstesting/assert.go
+++ b/awstesting/assert.go
@@ -25,12 +25,12 @@ func Match(t *testing.T, regex, expected string) {
 func AssertURL(t *testing.T, expect, actual string, msgAndArgs ...interface{}) bool {
 	expectURL, err := url.Parse(expect)
 	if err != nil {
-		t.Errorf(errMsg("unable to parse expected URL", err, msgAndArgs))
+		t.Error(errMsg("unable to parse expected URL", err, msgAndArgs))
 		return false
 	}
 	actualURL, err := url.Parse(actual)
 	if err != nil {
-		t.Errorf(errMsg("unable to parse actual URL", err, msgAndArgs))
+		t.Error(errMsg("unable to parse actual URL", err, msgAndArgs))
 		return false
 	}
 
@@ -47,12 +47,12 @@ var queryMapKey = regexp.MustCompile("(.*?)\\.[0-9]+\\.key")
 func AssertQuery(t *testing.T, expect, actual string, msgAndArgs ...interface{}) bool {
 	expectQ, err := url.ParseQuery(expect)
 	if err != nil {
-		t.Errorf(errMsg("unable to parse expected Query", err, msgAndArgs))
+		t.Error(errMsg("unable to parse expected Query", err, msgAndArgs))
 		return false
 	}
 	actualQ, err := url.ParseQuery(actual)
 	if err != nil {
-		t.Errorf(errMsg("unable to parse actual Query", err, msgAndArgs))
+		t.Error(errMsg("unable to parse actual Query", err, msgAndArgs))
 		return false
 	}
 
@@ -99,13 +99,13 @@ func AssertQuery(t *testing.T, expect, actual string, msgAndArgs ...interface{})
 func AssertJSON(t *testing.T, expect, actual string, msgAndArgs ...interface{}) bool {
 	expectVal := map[string]interface{}{}
 	if err := json.Unmarshal([]byte(expect), &expectVal); err != nil {
-		t.Errorf(errMsg("unable to parse expected JSON", err, msgAndArgs...))
+		t.Error(errMsg("unable to parse expected JSON", err, msgAndArgs...))
 		return false
 	}
 
 	actualVal := map[string]interface{}{}
 	if err := json.Unmarshal([]byte(actual), &actualVal); err != nil {
-		t.Errorf(errMsg("unable to parse actual JSON", err, msgAndArgs...))
+		t.Error(errMsg("unable to parse actual JSON", err, msgAndArgs...))
 		return false
 	}
 
diff --git a/private/model/api/load.go b/private/model/api/load.go
index 2ff3614d1ca..446be557219 100644
--- a/private/model/api/load.go
+++ b/private/model/api/load.go
@@ -225,7 +225,7 @@ func (a *API) Setup() error {
 
 	a.fixStutterNames()
 	if err := a.validateShapeNames(); err != nil {
-		log.Fatalf(err.Error())
+		log.Fatal(err.Error())
 	}
 	a.renameExportable()
 	a.applyShapeNameAliases()
diff --git a/service/dynamodb/dynamodbattribute/converter.go b/service/dynamodb/dynamodbattribute/converter.go
index e38e41dafd0..0c54d994942 100644
--- a/service/dynamodb/dynamodbattribute/converter.go
+++ b/service/dynamodb/dynamodbattribute/converter.go
@@ -3,6 +3,7 @@ package dynamodbattribute
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"reflect"
 	"runtime"
@@ -25,7 +26,7 @@ func ConvertToMap(in interface{}) (item map[string]*dynamodb.AttributeValue, err
 			if e, ok := r.(runtime.Error); ok {
 				err = e
 			} else if s, ok := r.(string); ok {
-				err = fmt.Errorf(s)
+				err = errors.New(s)
 			} else {
 				err = r.(error)
 			}
@@ -73,7 +74,7 @@ func ConvertFromMap(item map[string]*dynamodb.AttributeValue, v interface{}) (er
 			if e, ok := r.(runtime.Error); ok {
 				err = e
 			} else if s, ok := r.(string); ok {
-				err = fmt.Errorf(s)
+				err = errors.New(s)
 			} else {
 				err = r.(error)
 			}
@@ -127,7 +128,7 @@ func ConvertToList(in interface{}) (item []*dynamodb.AttributeValue, err error)
 			if e, ok := r.(runtime.Error); ok {
 				err = e
 			} else if s, ok := r.(string); ok {
-				err = fmt.Errorf(s)
+				err = errors.New(s)
 			} else {
 				err = r.(error)
 			}
@@ -176,7 +177,7 @@ func ConvertFromList(item []*dynamodb.AttributeValue, v interface{}) (err error)
 			if e, ok := r.(runtime.Error); ok {
 				err = e
 			} else if s, ok := r.(string); ok {
-				err = fmt.Errorf(s)
+				err = errors.New(s)
 			} else {
 				err = r.(error)
 			}
@@ -224,7 +225,7 @@ func ConvertTo(in interface{}) (item *dynamodb.AttributeValue, err error) {
 			if e, ok := r.(runtime.Error); ok {
 				err = e
 			} else if s, ok := r.(string); ok {
-				err = fmt.Errorf(s)
+				err = errors.New(s)
 			} else {
 				err = r.(error)
 			}
@@ -254,7 +255,7 @@ func ConvertFrom(item *dynamodb.AttributeValue, v interface{}) (err error) {
 			if e, ok := r.(runtime.Error); ok {
 				err = e
 			} else if s, ok := r.(string); ok {
-				err = fmt.Errorf(s)
+				err = errors.New(s)
 			} else {
 				err = r.(error)
 			}
diff --git a/service/sqs/checksums.go b/service/sqs/checksums.go
index e85e89a8170..1ce1a4c0cae 100644
--- a/service/sqs/checksums.go
+++ b/service/sqs/checksums.go
@@ -37,7 +37,7 @@ func verifySendMessage(r *request.Request) {
 		out := r.Data.(*SendMessageOutput)
 		err := checksumsMatch(in.MessageBody, out.MD5OfMessageBody)
 		if err != nil {
-			setChecksumError(r, err.Error())
+			setChecksumError(r, "%s", err.Error())
 		}
 	}
 }