this might resolve the error

aman-godara · aman-godara · commit e0e0a9610ff2 · 2021-08-01T03:13:26.000+05:30
diff --git a/src/tests/stringlist/Makefile.manual b/src/tests/stringlist/Makefile.manual
@@ -0,0 +1,4 @@
+PROGS_SRC = test_insert_at.f90
+
+
+include ../Makefile.manual.test.mk

-Original file line number
+Diff line change
@@ @@ -0,0 +1,4 @@ @@
 +PROGS_SRC = test_insert_at.f90
++
++
 +include ../Makefile.manual.test.mk