BYER, Judge:
Stress is an inescapable fact of daily life for many people. It also has a major negative impact on the health of American workers. Some people are more susceptible to stress injuries than others. Sometimes, stress can cause a “physical” impairment, like a heart attack.1 Sometimes the injury is not physical, but mental.2 When stress in the [266]*266workplace causes or aggravates an injury, it might be compensable under the Pennsylvania Workmen’s Compensation Act, Act of June 2,1915, P.L. 736, as amended, 77 P.S. §§ 1-1031.
This case involves a workmen’s compensation claim for mental injuries allegedly caused by stress in the workplace. In deciding this case, we must apply our Supreme Court’s recent decision in Martin v. Ketchum, Inc., 523 Pa. 509, 568 A.2d 159 (1990), which establishes a heightened burden of proof for claimants asserting a work-related mental injury.
Thomas M. Waldo filed a claim petition alleging that he suffered a mental injury in the nature of depression and anxiety while working for Erie Metropolitan Transit Authority (employer) in his capacity as a bus driver. Waldo claimed that job pressure caused his injury.
At the hearing before the referee, Waldo testified that his injury occurred as a result of being harassed by employer and fellow employees because of an accident which occurred while he was driving a bus. Waldo’s treating psychiatrist, Akhter F. Husain, M.D., testified that Waldo suffered from a mixed personality disorder which caused him to have difficulty with any kind of stress in his life. Dr. Husain opined that Waldo’s main pre-occupation was his work, and “it was contributing to his continuing anxiety.” (27a).
Employer presented the testimony of its superintendent who testified he was aware of Waldo’s problems, but that Waldo had not previously complained about stress at work, but had complained about problems of a personal nature. Employer’s personnel manager, Wendy L. Schubert, testified, that on July 11, 1984, Waldo applied for and received [267]*267disability benefits under employer’s plan with Protective Home Life Insurance Company. On this claim form, Waldo claimed that his depression was a non-work related injury. Dr. Husain, who filled in the physician’s portion of this form, also stated that Waldo’s depression was non-work related. Similar forms, filled out by Waldo and Dr. Husain on September 5,1984, October 19,1984, November 20,1984, and December 17, 1984, also indicated that Waldo’s depression was non-work related. (143a-149a).3
Employer also introduced the testimony of its expert, Edward Wallerstein, M.D., a psychiatrist. Dr. Wallerstein described Waldo as suffering from a borderline personality disorder which was “lifelong and was not caused or aggravated in any way by his employment.” (Referee Finding of Fact 10.)4
The referee accepted as credible Dr. Wallerstein’s testimony that Waldo’s injury was not sustained in the course of his employment. The referee rejected Dr. Husain’s testimony that Waldo’s injury was work-related. The referee also stated that even if Waldo’s injury was caused by his employment, “it resulted from Waldo’s subjective reaction to normal working conditions.” (Referee Finding of Fact 13.) Waldo appealed and the board affirmed.
Waldo presents three issues for our review: (1) whether the referee’s findings are based upon substantial evidence; (2) whether the referee erred as a matter of law in conclud[268]*268ing that Waldo’s injury was the result of a subjective reaction to normal working conditions; and (3) whether the referee and board improperly adopted and misapplied an “unusual psychological result doctrine.”
Waldo asserts that he presented objective, unequivocal evidence through the testimony of Dr. Husain that he suffers from a psychiatric injury. Waldo argues that even Dr. Wallerstein admitted that he suffered from a mental injury, albeit not work-related, and therefore the referee “capriciously disregarded” competent evidence. However, a capricious disregard standard of review does not apply when conflicting testimony has been presented. See Russell v. Workmen’s Compensation Appeal Board (Volkswagen of America), 121 Pa.Commonwealth Ct. 436, 550 A.2d 1364 (1988).
Furthermore, the fact that Waldo suffered from a mental disorder is insufficient by itself to entitle him to benefits under the act. Waldo, to recover benefits, must establish that workplace conditions caused or aggravated his condition. The pivotal issue in this case is whether Waldo has established the required causal relationship between his employment and his mental injury.
Our analysis must begin with the recent decision in Martin v. Ketchum, Inc., 523 Pa. 509, 568 A.2d 159 (1990), which involved a suicide allegedly precipitated by work-related stress. The Supreme Court applied the chain-of-causation test it had adopted in Globe Security Systems Co. v. Workmen’s Compensation Appeal Board (Guerrero), 518 Pa. 544, 544 A.2d 953 (1988),5 and found nothing in the [269]*269record that indicated that Mr. Martin’s suicide was caused by his employment. The court stated, “It was Martin’s failure to meet his self-imposed expectations and his perception of success that caused him to take his life.” Martin, 523 Pa. at 520, 568 A.2d at 165.
It is the element of causation on which the Supreme Court focused in Martin. Because of the subjective nature of mental injuries, the majority opinion in Martin established a heightened burden of proof to recover workmen’s compensation benefits for a psychiatric injury, requiring that the claimant prove by objective evidence (1) that he has suffered a mental injury; and (2) that such injury is other than a subjective reaction to normal working conditions, which requires that the employee establish that the mental injury was caused by “abnormal working conditions.” Id., 523 Pa. at 517-18, 568 A.2d at 163-164. The court in Martin reasoned as follows:
Abandoning the distinction between normal and abnormal working conditions, as the Appellant urges us to do, would eliminate the element of causation. It would destroy the fundamental principle underlying the scheme of the Workmen’s Compensation Act — that, in order to be compensable, an injury must be work-related. Under the Appellant’s theory, a claimant would have to establish only that the employee suffered from a mental illness while employed and that the illness was a condition created or aggravated by that employee’s perception of the conditions of his employment. That would reduce workmen’s compensation benefits to nothing more than a disability or death benefit payable only because of the employee status of the claimant — and not because the injury was caused by his employment.
Id.6
Under Martin, the claimant must produce “objective evidence which is corroborative of his subjective de[270]
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BYER, Judge:
Stress is an inescapable fact of daily life for many people. It also has a major negative impact on the health of American workers. Some people are more susceptible to stress injuries than others. Sometimes, stress can cause a “physical” impairment, like a heart attack.1 Sometimes the injury is not physical, but mental.2 When stress in the [266]*266workplace causes or aggravates an injury, it might be compensable under the Pennsylvania Workmen’s Compensation Act, Act of June 2,1915, P.L. 736, as amended, 77 P.S. §§ 1-1031.
This case involves a workmen’s compensation claim for mental injuries allegedly caused by stress in the workplace. In deciding this case, we must apply our Supreme Court’s recent decision in Martin v. Ketchum, Inc., 523 Pa. 509, 568 A.2d 159 (1990), which establishes a heightened burden of proof for claimants asserting a work-related mental injury.
Thomas M. Waldo filed a claim petition alleging that he suffered a mental injury in the nature of depression and anxiety while working for Erie Metropolitan Transit Authority (employer) in his capacity as a bus driver. Waldo claimed that job pressure caused his injury.
At the hearing before the referee, Waldo testified that his injury occurred as a result of being harassed by employer and fellow employees because of an accident which occurred while he was driving a bus. Waldo’s treating psychiatrist, Akhter F. Husain, M.D., testified that Waldo suffered from a mixed personality disorder which caused him to have difficulty with any kind of stress in his life. Dr. Husain opined that Waldo’s main pre-occupation was his work, and “it was contributing to his continuing anxiety.” (27a).
Employer presented the testimony of its superintendent who testified he was aware of Waldo’s problems, but that Waldo had not previously complained about stress at work, but had complained about problems of a personal nature. Employer’s personnel manager, Wendy L. Schubert, testified, that on July 11, 1984, Waldo applied for and received [267]*267disability benefits under employer’s plan with Protective Home Life Insurance Company. On this claim form, Waldo claimed that his depression was a non-work related injury. Dr. Husain, who filled in the physician’s portion of this form, also stated that Waldo’s depression was non-work related. Similar forms, filled out by Waldo and Dr. Husain on September 5,1984, October 19,1984, November 20,1984, and December 17, 1984, also indicated that Waldo’s depression was non-work related. (143a-149a).3
Employer also introduced the testimony of its expert, Edward Wallerstein, M.D., a psychiatrist. Dr. Wallerstein described Waldo as suffering from a borderline personality disorder which was “lifelong and was not caused or aggravated in any way by his employment.” (Referee Finding of Fact 10.)4
The referee accepted as credible Dr. Wallerstein’s testimony that Waldo’s injury was not sustained in the course of his employment. The referee rejected Dr. Husain’s testimony that Waldo’s injury was work-related. The referee also stated that even if Waldo’s injury was caused by his employment, “it resulted from Waldo’s subjective reaction to normal working conditions.” (Referee Finding of Fact 13.) Waldo appealed and the board affirmed.
Waldo presents three issues for our review: (1) whether the referee’s findings are based upon substantial evidence; (2) whether the referee erred as a matter of law in conclud[268]*268ing that Waldo’s injury was the result of a subjective reaction to normal working conditions; and (3) whether the referee and board improperly adopted and misapplied an “unusual psychological result doctrine.”
Waldo asserts that he presented objective, unequivocal evidence through the testimony of Dr. Husain that he suffers from a psychiatric injury. Waldo argues that even Dr. Wallerstein admitted that he suffered from a mental injury, albeit not work-related, and therefore the referee “capriciously disregarded” competent evidence. However, a capricious disregard standard of review does not apply when conflicting testimony has been presented. See Russell v. Workmen’s Compensation Appeal Board (Volkswagen of America), 121 Pa.Commonwealth Ct. 436, 550 A.2d 1364 (1988).
Furthermore, the fact that Waldo suffered from a mental disorder is insufficient by itself to entitle him to benefits under the act. Waldo, to recover benefits, must establish that workplace conditions caused or aggravated his condition. The pivotal issue in this case is whether Waldo has established the required causal relationship between his employment and his mental injury.
Our analysis must begin with the recent decision in Martin v. Ketchum, Inc., 523 Pa. 509, 568 A.2d 159 (1990), which involved a suicide allegedly precipitated by work-related stress. The Supreme Court applied the chain-of-causation test it had adopted in Globe Security Systems Co. v. Workmen’s Compensation Appeal Board (Guerrero), 518 Pa. 544, 544 A.2d 953 (1988),5 and found nothing in the [269]*269record that indicated that Mr. Martin’s suicide was caused by his employment. The court stated, “It was Martin’s failure to meet his self-imposed expectations and his perception of success that caused him to take his life.” Martin, 523 Pa. at 520, 568 A.2d at 165.
It is the element of causation on which the Supreme Court focused in Martin. Because of the subjective nature of mental injuries, the majority opinion in Martin established a heightened burden of proof to recover workmen’s compensation benefits for a psychiatric injury, requiring that the claimant prove by objective evidence (1) that he has suffered a mental injury; and (2) that such injury is other than a subjective reaction to normal working conditions, which requires that the employee establish that the mental injury was caused by “abnormal working conditions.” Id., 523 Pa. at 517-18, 568 A.2d at 163-164. The court in Martin reasoned as follows:
Abandoning the distinction between normal and abnormal working conditions, as the Appellant urges us to do, would eliminate the element of causation. It would destroy the fundamental principle underlying the scheme of the Workmen’s Compensation Act — that, in order to be compensable, an injury must be work-related. Under the Appellant’s theory, a claimant would have to establish only that the employee suffered from a mental illness while employed and that the illness was a condition created or aggravated by that employee’s perception of the conditions of his employment. That would reduce workmen’s compensation benefits to nothing more than a disability or death benefit payable only because of the employee status of the claimant — and not because the injury was caused by his employment.
Id.6
Under Martin, the claimant must produce “objective evidence which is corroborative of his subjective de[270]*270scription of the working conditions alleged to have caused the psychiatric injury.” Id., 523 Pa. at 519, 568 A.2d at 164-65, citing Russella v. Workmen’s Compensation Appeal Board (National Foam Systems Inc.), 91 Pa. Commonwealth Ct. 471, 475, 497 A.2d 290, 292 (1985). Even mental and nervous disabilities resulting from work-related stress, if due to an employee’s subjective reaction to being at work and being exposed to normal working conditions, is not compensable under the act. Thomas v. Workmen’s Compensation Appeal Board (Atlantic Refining Co.), 55 Pa. Commonwealth Ct. 449, 423 A.2d 784 (1980). A claimant cannot rely solely upon his own account of the working [271]*271environment to meet the burden of showing that a psychiatric injury was not caused by a subjective reaction to normal working conditions. Supinski v. Workmen’s Compensation Appeal Board (School District of Philadelphia), 133 Pa.Commonwealth Ct. 631, 577 A.2d 944 (1990); Andracki v. Workmen’s Compensation Appeal Board (Allied Eastern States Maintenance), 96 Pa.Commonwealth Ct. 613, 508 A.2d 624 (1986).7
Our review of the record, discloses no evidence corroborating Waldo’s subjective description of the working conditions which allegedly caused his mental injury. Waldo made no effort to establish the existence of abnormal working conditions. So far as we can discern from the record and the facts found by the referee, Waldo at best can establish that the injury resulted from his subjective reaction to normal working conditions, which Martin holds is noncompensable under the act. Furthermore, the referee accepted as credible the testimony of Dr. Wallerstein that Waldo’s employment did not cause his injury, and we are bound by this finding. Bethenergy Mines, Inc. v. Workmen’s Compensation Appeal Board (Skirpan), 132 Pa. Commonwealth Ct. 277, 572 A.2d 838 (1990).
Waldo next argues that an “unusual psychological result doctrine” was improperly adopted and misapplied by the referee and the board, because the 1972 amendments to the act eliminated the “unusual pathological result doctrine.” Because the definition of injury under the act now specifically includes aggravation, reactivation, or acceleration of the injury, section 301(c) of the act, 77 P.S. § 411(1), Waldo claims his pre-existing problems do not bar his recovery. The claimant in Sibrava v. Workmen’s Compensation Appeal Board (TWA), 113 Pa.Commonwealth Ct. 286, 537 A.2d 75 (1988), advanced this argument but we stated:
[272]*272While this Court has embraced the view that work-related psychiatric disability alone can be compensable, the practical difficulties in evaluating the merit of these claims have led the Court to adopt the evidentiary safeguard of pinpointing causation and demonstrating objective perceptions of workplace events so as to provide more reliable bases for making factual determinations and to deter frivolous claims.
Id., 113 Pa.Commonwealth Ct. at 289-90, 537 A.2d at 77 (footnote omitted) (emphasis added).
Our review of the record fails to discover evidence that adequately attributes the cause of Waldo’s injury to abnormal working conditions, as required by Martin. Therefore, we affirm the order of the Workmen’s Compensation Appeal Board.
ORDER
The Order of the Workmen’s Compensation Appeal Board is affirmed.