diff --git a/programs/lz4io.c b/programs/lz4io.c
index 61d8009..725d3a8 100644
--- a/programs/lz4io.c
+++ b/programs/lz4io.c
@@ -301,7 +301,7 @@ static FILE* LZ4IO_openDstFile(const char* dstFileName)
     }
 
     /* sparse file */
-    if (f && g_sparseFileSupport) { SET_SPARSE_FILE_MODE(foutput); }
+    if (f && g_sparseFileSupport) { SET_SPARSE_FILE_MODE(f); }
 
     return f;
 }
diff --git a/tests/Makefile b/tests/Makefile
index 16771da..2a11442 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -58,7 +58,7 @@ endif
 
 # Default test parameters
 TEST_FILES   := COPYING
-FUZZER_TIME  := -T9mn
+FUZZER_TIME  := -T3mn
 
 
 default: bins