Q: Does California use the Predominant Factor Test?

A: Yes

See C9 Ventures v. SVC-West, L.P. (2012) 202 Cal.App.4th 1483, 1494 [136 Cal.Rptr.3d 550, 559][“We find no legal test to determine whether a hybrid transaction involving lease of a vessel and sale of its contents is a lease or transaction for the sale of goods. However, in deciding the somewhat analogous question whether a hybrid transaction for goods and services is predominantly a sale of goods governed by the Uniform Commercial Code, or predominantly a transaction for services governed by common law, courts have looked to the essence of the transaction. (Filmservice Laboratories, Inc. v. Harvey Bernhard Enterprises, Inc. (1989) 208 Cal.App.3d 1297, 1305, 256 Cal.Rptr. 735; Bonebrake v. Cox (8th Cir.1974) 499 F.2d 951, 960.) The court may compare the relative cost of the goods and services in the transaction and the purpose of the agreement in order to determine whether it is predominantly a sale of goods or transaction for services. (See Pittsley v. Houser (1994) 125 Idaho 820, 823, 875 P.2d 232, 235 [transaction for purchase and installation of carpet predominantly transaction for sale of goods].) “The test for inclusion or exclusion is not whether [goods and services] are mixed, but, granting that they are mixed, whether their predominant factor, their thrust, their purpose, reasonably stated, is the rendition of service, with goods incidentally involved (e.g., contract with artist for painting) or is a transaction of sale, with labor incidentally involved (e.g., installation of a water heater in a bathroom).” (Bonebrake v. Cox, supra, 499 F.2d at p. 960, fns. omitted.)]