diff --git a/tests/syntax/cpp-command.c b/tests/syntax/cpp-command.c
index adc42b573ed25ab2b9c51b237cc0513cdad753ae..00e4406e065139bc78eeb528b105d01865a81c01 100644
--- a/tests/syntax/cpp-command.c
+++ b/tests/syntax/cpp-command.c
@@ -2,6 +2,6 @@
    FILTER: sed 's|/tmp/[^ ]*\.i|/tmp/FILE.i|g'
    OPT: -no-autoload-plugins -cpp-frama-c-compliant -cpp-command "echo ['%1' '%1' '%i' '%input'] ['%2' '%2' '%o' '%output'] ['%args']"
    OPT: -no-autoload-plugins -cpp-frama-c-compliant -cpp-command "echo %%1 = '%1' %%2 = '%2' %%args = '%args'"
-   OPT: -no-autoload-plugins -cpp-frama-c-compliant -cpp-command "echo using \\\\% has no effect : '\\\\%input'"
+   OPT: -no-autoload-plugins -cpp-frama-c-compliant -cpp-command "printf "%s" 'using \\% has no effect : \%input'"
    OPT: -no-autoload-plugins -cpp-frama-c-compliant -cpp-command "echo %var is not an interpreted placeholder"
    */
\ No newline at end of file
diff --git a/tests/syntax/oracle/cpp-command.2.res.oracle b/tests/syntax/oracle/cpp-command.2.res.oracle
index 839a028f0429749235224828e1b877da72f024ab..a2e6e59f426a8c819eec8ba40070250939ebf582 100644
--- a/tests/syntax/oracle/cpp-command.2.res.oracle
+++ b/tests/syntax/oracle/cpp-command.2.res.oracle
@@ -1,2 +1,2 @@
 [kernel] Parsing tests/syntax/cpp-command.c (with preprocessing)
-using \% has no effect : \tests/syntax/cpp-command.c
+using \% has no effect : \tests/syntax/cpp-command.c
\ No newline at end of file