diff --git a/unittests/POSIX/Disabled_Tests b/unittests/POSIX/Disabled_Tests
index 8c274ea63..256709222 100644
--- a/unittests/POSIX/Disabled_Tests
+++ b/unittests/POSIX/Disabled_Tests
@@ -1,7 +1,7 @@
 # these are inconsistent or fail on CI
 nanosleep-2-1.test
 conformance-interfaces-clock_nanosleep-2-1.test
-conformance-interfaces-difftime-1-1
+conformance-interfaces-difftime-1-1.test
 
 # These tests are inconsistent
 conformance-interfaces-mmap-12-1.test
diff --git a/unittests/POSIX/Known_Failures b/unittests/POSIX/Known_Failures
index e1fc04690..15630bcaa 100644
--- a/unittests/POSIX/Known_Failures
+++ b/unittests/POSIX/Known_Failures
@@ -610,4 +610,4 @@ conformance-interfaces-clock_nanosleep-2-2.test
 # these are inconsistent or fail on CI
 nanosleep-2-1.test
 conformance-interfaces-clock_nanosleep-2-1.test
-conformance-interfaces-difftime-1-1
\ No newline at end of file
+conformance-interfaces-difftime-1-1.test
\ No newline at end of file