diff --git a/modules/openapi-generator/src/main/resources/go/client.mustache b/modules/openapi-generator/src/main/resources/go/client.mustache
index 616772c8891..06d61f88666 100644
--- a/modules/openapi-generator/src/main/resources/go/client.mustache
+++ b/modules/openapi-generator/src/main/resources/go/client.mustache
@@ -712,5 +712,5 @@ func formatErrorMessage(status string, v interface{}) string {
 	}
 
 	// status title (detail)
-	return fmt.Sprintf("%s %s", status, str)
+	return strings.TrimSpace(fmt.Sprintf("%s %s", status, str))
 }
diff --git a/samples/client/petstore/go/go-petstore/client.go b/samples/client/petstore/go/go-petstore/client.go
index 68b58dc81f1..4cca0669400 100644
--- a/samples/client/petstore/go/go-petstore/client.go
+++ b/samples/client/petstore/go/go-petstore/client.go
@@ -672,5 +672,5 @@ func formatErrorMessage(status string, v interface{}) string {
 	}
 
 	// status title (detail)
-	return fmt.Sprintf("%s %s", status, str)
+	return strings.TrimSpace(fmt.Sprintf("%s %s", status, str))
 }
diff --git a/samples/openapi3/client/extensions/x-auth-id-alias/go-experimental/client.go b/samples/openapi3/client/extensions/x-auth-id-alias/go-experimental/client.go
index 3a48f969830..b641ac83f2e 100644
--- a/samples/openapi3/client/extensions/x-auth-id-alias/go-experimental/client.go
+++ b/samples/openapi3/client/extensions/x-auth-id-alias/go-experimental/client.go
@@ -657,5 +657,5 @@ func formatErrorMessage(status string, v interface{}) string {
 	}
 
 	// status title (detail)
-	return fmt.Sprintf("%s %s", status, str)
+	return strings.TrimSpace(fmt.Sprintf("%s %s", status, str))
 }
diff --git a/samples/openapi3/client/petstore/go/go-petstore/client.go b/samples/openapi3/client/petstore/go/go-petstore/client.go
index fa1714c97fb..0c80456c12d 100644
--- a/samples/openapi3/client/petstore/go/go-petstore/client.go
+++ b/samples/openapi3/client/petstore/go/go-petstore/client.go
@@ -685,5 +685,5 @@ func formatErrorMessage(status string, v interface{}) string {
 	}
 
 	// status title (detail)
-	return fmt.Sprintf("%s %s", status, str)
+	return strings.TrimSpace(fmt.Sprintf("%s %s", status, str))
 }