Photometry of symbiotic stars

New UBV observations of symbiotic stars CH Cyg and UV Aur and of symbiotic-like star 4 Dra are published. The observations were made between September 1988 and September 1989 at the Skalnate Pleso Observatory. A sudden change in the brightness (-2 mag) of CH Cyg in U colour was indicated in May-August 1989. Flickering of the U magnitude (Delta U approx 0.3 - 0.7 mag) was again observed at the same time. These changes can be classified as a new outburst. The UV Aur observations indicate the expected variability with maximum amplitude in the V colour. The observations of 4 Dra in March through September 1989 display a gradual decrease of brightness in all 3 colours with an occasional occurrence of short-term (weekly) variability, most pronounced in the B and V colours.