diff --git a/swift/ql/src/diagnostics/SuccessfullyExtractedLines.ql b/swift/ql/src/diagnostics/SuccessfullyExtractedLines.ql
index 5aec16da4ef4..0de0cb1ae1ac 100644
--- a/swift/ql/src/diagnostics/SuccessfullyExtractedLines.ql
+++ b/swift/ql/src/diagnostics/SuccessfullyExtractedLines.ql
@@ -9,4 +9,4 @@
 
 import swift
 
-select sum(File f | | f.getNumberOfLinesOfCode())
+select sum(File f | exists(f.getRelativePath()) | f.getNumberOfLinesOfCode())
diff --git a/swift/ql/test/query-tests/Diagnostics/SuccessfullyExtractedLines.expected b/swift/ql/test/query-tests/Diagnostics/SuccessfullyExtractedLines.expected
index beaf5bb6a1f3..b5a514b9ffa6 100644
--- a/swift/ql/test/query-tests/Diagnostics/SuccessfullyExtractedLines.expected
+++ b/swift/ql/test/query-tests/Diagnostics/SuccessfullyExtractedLines.expected
@@ -1 +1 @@
-| 299 |
+| 4 |