A composition comprising, based on the total weight of the composition: from 20 to 90 wt.% of a polyester component consisting only of poly(butylene terephthalate),; from 5 to 35 wt.% of a flame retardant phosphinate of the formula [(R 1)(R 2) -O] - m M m+, a flame retardant diphosphinate of the formula [(O-POR 1)(R 3)(POR 2 -O)] 2- n M m+ x, a flame retardant polymer derived from the flame retardant phosphinate of the formula or the flame retardant diphosphinate of the formula, or combinations thereof, wherein R 1 and R 2 are identical or different and are H, C 1 -C 6 alkyl, linear or branched, or C 6 -C 10 aryl; and R 3 is C 1 -C 10, alkylene, linear or branched, C 6 -C 10 arylene, C 7 -C 11 alkylarylene, or C 7 -C 11 arylalkylene; M is an alkaline earth metal, alkali metal, Al, Ti, Zn, Fe, or boron; m is 1, 2, 3 or 4; n is 1,2, or 3; and x is 1 or 2; from 1 to 25 wt.% of a melamine polyphosphate, melamine cyanurate, melamine pyrophosphate, and/or melamine phosphate; from 0.02 to 2 wt.% of an anti-dripping agent comprising poly(tetrafluoroethylene) encapsulated by a styrene-acrylonitrile copolymer; from greater than zero to 50 wt.% of a glass fiber having a non-circular cross-section, an average length of from 0.1 to 10 mm, and an average aspect ratio of 2 to 5; and from 0 to 5 wt.% of an additive selected from the group consisting of a mold release agent, an antioxidant, a nucleating agent, a thermal stabilizer, a flow-promoting additive, a chain extender, a platy filler, and a UV stabilizer; wherein the components have a combined total weight of 100 wt.%; wherein a molded article comprising the composition has a tensile stress at break at least 10 % higher than the same composition having the same amount of circular glass fibers, each measured in accordance with ASTM 790. from 20 to 90 wt.% of a polyester component consisting only of poly(butylene terephthalate),; from 5 to 35 wt.% of a flame retardant phosphinate of the formula [(R 1)(R 2) -O] - m M m+, a flame retardant diphosphinate of the formula [(O-POR 1)(R 3)(POR 2 -O)] 2- n M m+ x, a flame retardant polymer derived from the flame retardant phosphinate of the formula or the flame retardant diphosphinate of the formula, or combinations thereof, wherein R 1 and R 2 are identical or different and are H, C 1 -C 6 alkyl, linear or branched, or C 6 -C 10 aryl; and R 3 is C 1 -C 10, alkylene, linear or branched, C 6 -C 10 arylene, C 7 -C 11 alkylarylene, or C 7 -C 11 arylalkylene; M is an alkaline earth metal, alkali metal, Al, Ti, Zn, Fe, or boron; m is 1, 2, 3 or 4; n is 1,2, or 3; and x is 1 or 2; a flame retardant phosphinate of the formula [(R 1)(R 2) -O] - m M m+, a flame retardant diphosphinate of the formula [(O-POR 1)(R 3)(POR 2 -O)] 2- n M m+ x, a flame retardant polymer derived from the flame retardant phosphinate of the formula or the flame retardant diphosphinate of the formula, or combinations thereof, wherein R 1 and R 2 are identical or different and are H, C 1 -C 6 alkyl, linear or branched, or C 6 -C 10 aryl; and R 3 is C 1 -C 10, alkylene, linear or branched, C 6 -C 10 arylene, C 7 -C 11 alkylarylene, or C 7 -C 11 arylalkylene; M is an alkaline earth metal, alkali metal, Al, Ti, Zn, Fe, or boron; m is 1, 2, 3 or 4; n is 1,2, or 3; and x is 1 or 2; from 1 to 25 wt.% of a melamine polyphosphate, melamine cyanurate, melamine pyrophosphate, and/or melamine phosphate; from 0.02 to 2 wt.% of an anti-dripping agent comprising poly(tetrafluoroethylene) encapsulated by a styrene-acrylonitrile copolymer; from greater than zero to 50 wt.% of a glass fiber having a non-circular cross-section, an average length of from 0.1 to 10 mm, and an average aspect ratio of 2 to 5; and from 0 to 5 wt.% of an additive selected from the group consisting of a mold release agent, an antioxidant, a nucleating agent, a thermal stabilizer, a flow-promoting additive, a chain extender, a platy filler, and a UV stabilizer; wherein the components have a combined total weight of 100 wt.%; wherein a molded article comprising the composition has a tensile stress at break at least 10 % higher than the same composition having the same amount of circular glass fibers, each measured in accordance with ASTM 790.