same here: 

Test 1 FAILED: 
Input DNA: ATGCATGAATGTAGATAGATGTGCCC
Expected Output: ATGAATGTAGATAGATGTGCCC
Actual (your) Output: ATGAATGTAGATAGATGTGCC
Test 2 FAILED: 
Input DNA: GCATGCATGGGTTATATCATGAAATAG
Expected Output: ATGCATGGGTTATATCATGAAATAG
Actual (your) Output: ATGCATGGGTTATATCATGAAATA
Test 3 FAILED: 
Input DNA: CTACTAATGGCCCATAAACATC
Expected Output: ATGGCCCATAAACATC
Actual (your) Output: ATGGCCCATAAACAT
FAILED - finds the longest ORF, reverse strand included