London-based education and publishing company Pearson plc (NYSE:PSO) announced Wednesday that its Pearson VUE subsidiary has acquired test-development software maker Exam Design,

Exam Design makes ExamDeveloper web-based software, which Pearson VUE itself has been using for the past year to develop tests for use by "a variety of clients." Having taken the company for a year-long test drive, Pearson VUE believes the company will be a good fit, and has decided to buy it (for an undisclosed sum).

Financial terms of the acquisition were not disclosed, nor did Pearson give details on Exam Design's revenues or profitability. Investors, however, seem to have decided to shoot first and ask questions later, bidding down shares of the parent company by 0.8%. Pearson shares closed Wednesday trading at $17.79.