diff --git a/detect_gcs.go b/detect_gcs.go
index 2bf1bcf2..bdf7f344 100644
--- a/detect_gcs.go
+++ b/detect_gcs.go
@@ -29,7 +29,9 @@ func (d *GCSDetector) Detect(src, _ string) (string, bool, error) {
 	}
 
 	if strings.HasSuffix(parsedURL.Host, ".googleapis.com") {
-		return d.detectHTTP(strings.ReplaceAll(src, "https://", ""))
+		src = strings.TrimPrefix(src, "https://")
+		src = strings.TrimPrefix(src, "http://")
+		return d.detectHTTP(src)
 	}
 
 	return "", false, nil
diff --git a/detect_gcs_test.go b/detect_gcs_test.go
index e5022ca4..175f3fa6 100644
--- a/detect_gcs_test.go
+++ b/detect_gcs_test.go
@@ -60,6 +60,18 @@ func TestGCSDetector_MalformedDetectHTTP(t *testing.T) {
 			"",
 			"gcs::https://www.googleapis.com/storage/v1/my-bucket/foo/bar",
 		},
+		{
+			"valid url with https scheme",
+			"https://www.googleapis.com/storage/v1/my-bucket/foo/bar",
+			"",
+			"gcs::https://www.googleapis.com/storage/v1/my-bucket/foo/bar",
+		},
+		{
+			"valid url with http scheme",
+			"http://www.googleapis.com/storage/v1/my-bucket/foo/bar",
+			"",
+			"gcs::https://www.googleapis.com/storage/v1/my-bucket/foo/bar",
+		},
 		{
 			"empty url",
 			"",
@@ -67,14 +79,20 @@ func TestGCSDetector_MalformedDetectHTTP(t *testing.T) {
 			"",
 		},
 		{
-			"not valid url length",
+			"not valid url",
+			"storage/v1/my-bucket/foo/bar",
+			"error parsing GCS URL",
+			"",
+		},
+		{
+			"not valid url domain",
 			"www.googleapis.com.invalid/storage/v1/",
 			"URL is not a valid GCS URL",
 			"",
 		},
 		{
 			"not valid url length",
-			"www.invalid.com/storage/v1",
+			"http://www.googleapis.com/storage",
 			"URL is not a valid GCS URL",
 			"",
 		},
diff --git a/detect_s3.go b/detect_s3.go
index e0d69829..698d7770 100644
--- a/detect_s3.go
+++ b/detect_s3.go
@@ -29,7 +29,9 @@ func (d *S3Detector) Detect(src, _ string) (string, bool, error) {
 	}
 
 	if strings.HasSuffix(parsedURL.Host, ".amazonaws.com") {
-		return d.detectHTTP(strings.ReplaceAll(src, "https://", ""))
+		src = strings.TrimPrefix(src, "https://")
+		src = strings.TrimPrefix(src, "http://")
+		return d.detectHTTP(src)
 	}
 
 	return "", false, nil
diff --git a/detect_s3_test.go b/detect_s3_test.go
index 883c7c8b..f892b01a 100644
--- a/detect_s3_test.go
+++ b/detect_s3_test.go
@@ -90,3 +90,70 @@ func TestS3Detector(t *testing.T) {
 		}
 	}
 }
+
+func TestS3Detector_MalformedDetectHTTP(t *testing.T) {
+	cases := []struct {
+		Name     string
+		Input    string
+		Expected string
+		Output   string
+	}{
+		{
+			"valid url",
+			"s3.amazonaws.com/bucket/foo/bar",
+			"",
+			"s3::https://s3.amazonaws.com/bucket/foo/bar",
+		},
+		{
+			"valid url with https scheme",
+			"https://s3.amazonaws.com/bucket/foo/bar",
+			"",
+			"s3::https://s3.amazonaws.com/bucket/foo/bar",
+		},
+		{
+			"valid url with http scheme",
+			"http://s3.amazonaws.com/bucket/foo/bar",
+			"",
+			"s3::https://s3.amazonaws.com/bucket/foo/bar",
+		},
+		{
+			"empty url",
+			"",
+			"",
+			"",
+		},
+		{
+			"not valid url",
+			"bucket/foo/bar",
+			"error parsing S3 URL",
+			"",
+		},
+		{
+			"not valid url domain",
+			"s3.amazonaws.com.invalid/bucket/foo/bar",
+			"error parsing S3 URL",
+			"",
+		},
+		{
+			"not valid url lenght",
+			"http://s3.amazonaws.com",
+			"URL is not a valid S3 URL",
+			"",
+		},
+	}
+
+	pwd := "/pwd"
+	f := new(S3Detector)
+	for _, tc := range cases {
+		output, _, err := f.Detect(tc.Input, pwd)
+		if err != nil {
+			if err.Error() != tc.Expected {
+				t.Fatalf("expected error %s, got %s for %s", tc.Expected, err.Error(), tc.Name)
+			}
+		}
+
+		if output != tc.Output {
+			t.Fatalf("expected %s, got %s for %s", tc.Output, output, tc.Name)
+		}
+	}
+}