diff --git a/tests/fc_script/estimate_difficulty.i b/tests/fc_script/estimate_difficulty.i
new file mode 100644
index 0000000000000000000000000000000000000000..23b63dd6c5250076eb5eb8e74f0197b0bd9a12cc
--- /dev/null
+++ b/tests/fc_script/estimate_difficulty.i
@@ -0,0 +1,28 @@
+/* run.config
+   NOFRAMAC: testing frama-c-script, not frama-c itself
+   EXECNOW: LOG @PTEST_NAME@.res LOG @PTEST_NAME@.err PTESTS_TESTING=1 %{bin:frama-c-script} estimate-difficulty @PTEST_FILE@ > @PTEST_NAME@.res 2> @PTEST_NAME@.err
+*/
+
+// these includes are not actually used by the compiler
+// (this is a preprocessed file), but analyzed by the script
+#include <sys/socket.h>
+# include <complex.h>
+  #	include <langinfo.h>
+#include <sys/socket.h>
+
+void g() {
+  int g = 42;
+}
+
+void f() {
+  if (v) f();
+  else g();
+}
+
+int main() {
+  va_arg(); // no warning: it is a macro, not a function
+  setjmp(); // warning: problematic
+  strlen(); // no warning
+  ccosl(); // warning: neither code nor spec
+  dprintf(); // no warning: neither code nor spec, but handled by Variadic
+}
diff --git a/tests/fc_script/oracle/estimate_difficulty.err b/tests/fc_script/oracle/estimate_difficulty.err
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/tests/fc_script/oracle/estimate_difficulty.res b/tests/fc_script/oracle/estimate_difficulty.res
new file mode 100644
index 0000000000000000000000000000000000000000..6b197b724146d7ba3507c29a2979df06f1027627
--- /dev/null
+++ b/tests/fc_script/oracle/estimate_difficulty.res
@@ -0,0 +1,11 @@
+Building callgraph...
+Computing data about libc/POSIX functions...
+[recursion] found recursive cycle near estimate_difficulty.i:18: f -> f
+Estimating difficulty for 7 function calls...
+- warning: ccosl (POSIX) has neither code nor spec in Frama-C's libc
+- warning: setjmp (POSIX) is known to be problematic for code analysis
+Function-related warnings: 2
+Estimating difficulty for 3 '#include <header>' directives...
+- WARNING: included header <complex.h> is explicitly unsupported by Frama-C
+- warning: included header <langinfo.h> not currently included in Frama-C's libc
+Header-related warnings: 2
diff --git a/tests/fc_script/oracle/find_fun1.res b/tests/fc_script/oracle/find_fun1.res
index f16fc61d2be3d40fae3e6b45961875fc0e7f0642..58bf804e3c123e33f21c6761b63dcefa26e2e129 100644
--- a/tests/fc_script/oracle/find_fun1.res
+++ b/tests/fc_script/oracle/find_fun1.res
@@ -1,4 +1,4 @@
-Looking for 'main2' inside 14 file(s)...
+Looking for 'main2' inside 15 file(s)...
 Possible declarations for function 'main2' in the following file(s):
   for-find-fun.c
 Possible definitions for function 'main2' in the following file(s):
diff --git a/tests/fc_script/oracle/find_fun2.res b/tests/fc_script/oracle/find_fun2.res
index fda8345bfc224212d8b8d653d325ed83b7acac7c..d868795ee4e11b8858e75185cfd91d68ea8a24e7 100644
--- a/tests/fc_script/oracle/find_fun2.res
+++ b/tests/fc_script/oracle/find_fun2.res
@@ -1,4 +1,4 @@
-Looking for 'main3' inside 14 file(s)...
+Looking for 'main3' inside 15 file(s)...
 Possible declarations for function 'main3' in the following file(s):
   for-find-fun2.c
 Possible definitions for function 'main3' in the following file(s):
diff --git a/tests/fc_script/oracle/find_fun3.res b/tests/fc_script/oracle/find_fun3.res
index 4a42d9117089960eb086c47a8e4b07b44795e3c3..00f4bbc10eab9c20620426e670d9d0cf6b715762 100644
--- a/tests/fc_script/oracle/find_fun3.res
+++ b/tests/fc_script/oracle/find_fun3.res
@@ -1,2 +1,2 @@
-Looking for 'false_positive' inside 14 file(s)...
+Looking for 'false_positive' inside 15 file(s)...
 No declaration/definition found for function 'false_positive'