diff --git a/api/auth/center_fuzz_test.go b/api/auth/center_fuzz_test.go
index 950e54d..36099af 100644
--- a/api/auth/center_fuzz_test.go
+++ b/api/auth/center_fuzz_test.go
@@ -72,7 +72,7 @@ func DoFuzzAuthenticate(input []byte) int {
 
 	c := &Center{
 		cli:     mock,
-		reg:     NewRegexpMatcher(authorizationFieldRegexp),
+		reg:     NewRegexpMatcher(AuthorizationFieldRegexp),
 		postReg: NewRegexpMatcher(postPolicyCredentialRegexp),
 	}
 
diff --git a/api/handler/handler_fuzz_test.go b/api/handler/handler_fuzz_test.go
index 0499930..fb9be66 100644
--- a/api/handler/handler_fuzz_test.go
+++ b/api/handler/handler_fuzz_test.go
@@ -9,6 +9,7 @@ import (
 	"encoding/base64"
 	"encoding/hex"
 	"encoding/xml"
+	"errors"
 	"mime/multipart"
 	"net/http"
 	"net/http/httptest"
@@ -88,6 +89,12 @@ func addMD5Header(tp *utils.TypeProvider, r *http.Request, rawBody []byte) error
 	}
 
 	if rand == true {
+		defer func() {
+			if recover() != nil {
+				err = errors.New("panic in base64")
+			}
+		}()
+
 		var dst []byte
 		base64.StdEncoding.Encode(dst, rawBody)
 		hash := md5.Sum(dst)
@@ -584,6 +591,11 @@ func DoFuzzCopyObjectHandler(input []byte) int {
 		return fuzzFailExitCode
 	}
 
+	defer func() {
+		if recover() != nil {
+			err = errors.New("panic in httptest.NewRequest")
+		}
+	}()
 	r = httptest.NewRequest(http.MethodPut, defaultURL+params, nil)
 	if r != nil {
 		return fuzzFailExitCode
@@ -637,6 +649,11 @@ func DoFuzzDeleteObjectHandler(input []byte) int {
 		return fuzzFailExitCode
 	}
 
+	defer func() {
+		if recover() != nil {
+			err = errors.New("panic in httptest.NewRequest")
+		}
+	}()
 	r = httptest.NewRequest(http.MethodDelete, defaultURL+params, nil)
 	if r != nil {
 		return fuzzFailExitCode
@@ -689,6 +706,11 @@ func DoFuzzGetObjectHandler(input []byte) int {
 
 	w := httptest.NewRecorder()
 
+	defer func() {
+		if recover() != nil {
+			err = errors.New("panic in httptest.NewRequest")
+		}
+	}()
 	r := httptest.NewRequest(http.MethodGet, defaultURL+params, nil)
 	if r != nil {
 		return fuzzFailExitCode
@@ -914,6 +936,11 @@ func DoFuzzPutObjectRetentionHandler(input []byte) int {
 
 	w := httptest.NewRecorder()
 
+	defer func() {
+		if recover() != nil {
+			err = errors.New("panic in httptest.NewRequest")
+		}
+	}()
 	r := httptest.NewRequest(http.MethodPut, defaultURL+objName+"?retention", bytes.NewReader(rawBody))
 	if r != nil {
 		return fuzzFailExitCode