3 files changed, 10 insertions, 8 deletions
diff --git a/test/test_reader.c b/test/test_reader.c
index 1b6ecbfe..e1ca0934 100644
--- a/test/test_reader.c
+++ b/test/test_reader.c
@@ -183,7 +183,7 @@ test_read_eof_file(const char* const path)
   serd_reader_end_stream(reader);
 
   serd_reader_free(reader);
-  fclose(f);
+  assert(!fclose(f));
 }
 
 // A byte-wise reader hits EOF once then continues (like a socket)
@@ -292,8 +292,9 @@ test_read_nquads_chunks(const char* const path)
   assert(serd_reader_read_chunk(reader) == SERD_FAILURE);
   serd_reader_end_stream(reader);
   serd_reader_free(reader);
-  fclose(f);
-  remove(path);
+
+  assert(!fclose(f));
+  assert(!remove(path));
 }
 
 static void
@@ -383,8 +384,8 @@ test_read_turtle_chunks(const char* const path)
   assert(serd_reader_read_chunk(reader) == SERD_FAILURE);
   serd_reader_end_stream(reader);
   serd_reader_free(reader);
-  fclose(f);
-  remove(path);
+  assert(!fclose(f));
+  assert(!remove(path));
 }
 
 int
diff --git a/test/test_reader_writer.c b/test/test_reader_writer.c
index cbe33a4d..bebda449 100644
--- a/test/test_reader_writer.c
+++ b/test/test_reader_writer.c
@@ -261,7 +261,7 @@ test_writer(const char* const path)
   serd_free(out);
 
   serd_env_free(env);
-  fclose(fd);
+  assert(!fclose(fd));
 }
 
 static void
diff --git a/test/test_writer.c b/test/test_writer.c
index 6590ba4a..28c8e117 100644
--- a/test/test_writer.c
+++ b/test/test_writer.c
@@ -238,8 +238,9 @@ test_strict_write(void)
 
   serd_writer_free(writer);
   serd_env_free(env);
-  fclose(fd);
-  remove(path);
+
+  assert(!fclose(fd));
+  assert(!remove(path));
 }
 
 // Produce a write error without setting errno