diff --git a/libqpdf/qpdf-c.cc b/libqpdf/qpdf-c.cc
index a5dda2a..063adaf 100644
--- a/libqpdf/qpdf-c.cc
+++ b/libqpdf/qpdf-c.cc
@@ -828,6 +828,7 @@ void qpdf_register_progress_reporter(
     void (*report_progress)(int percent, void* data),
     void* data)
 {
+    QTC::TC("qpdf", "qpdf-c registered progress reporter");
     qpdf->qpdf_writer->registerProgressReporter(
         new ProgressReporter(report_progress, data));
 }
diff --git a/qpdf/qpdf-ctest.c b/qpdf/qpdf-ctest.c
index 86ddb0b..4d30712 100644
--- a/qpdf/qpdf-ctest.c
+++ b/qpdf/qpdf-ctest.c
@@ -117,6 +117,11 @@ static void read_file_into_memory(char const* filename,
     fclose(f);
 }
 
+static void count_progress(int percent, void* data)
+{
+    ++(*(int*)data);
+}
+
 static void test01(char const* infile,
 		   char const* password,
 		   char const* outfile,
@@ -201,11 +206,15 @@ static void test05(char const* infile,
 		   char const* outfile,
 		   char const* outfile2)
 {
+    int count = 0;
     qpdf_read(qpdf, infile, password);
     qpdf_init_write(qpdf, outfile);
+    qpdf_register_progress_reporter(qpdf, count_progress, (void*)&count);
     qpdf_set_static_ID(qpdf, QPDF_TRUE);
     qpdf_set_linearization(qpdf, QPDF_TRUE);
     qpdf_write(qpdf);
+    /* make sure progress reporter was called */
+    assert(count > 0);
     report_errors();
 }
 
diff --git a/qpdf/qpdf.testcov b/qpdf/qpdf.testcov
index b974af6..e3f6b00 100644
--- a/qpdf/qpdf.testcov
+++ b/qpdf/qpdf.testcov
@@ -601,3 +601,4 @@ qpdf overlay page with no resources 0
 QPDFObjectHandle check ownership 0
 qpdf weak crypto warning 0
 qpdf-c called qpdf_oh_is_initialized 0
+qpdf-c registered progress reporter 0