diff --git a/ocrmypdf/exec/ghostscript.py b/ocrmypdf/exec/ghostscript.py
index dca504d8..c022c4f3 100644
--- a/ocrmypdf/exec/ghostscript.py
+++ b/ocrmypdf/exec/ghostscript.py
@@ -81,7 +81,7 @@ def generate_pdfa(pdf_pages, output_file, log, threads=1):
                   universal_newlines=True)
         stdout, _ = p.communicate()
 
-        if 'error' in stdout:
+        if 'error' in stdout or 'ERROR' in stdout:
             log.error(stdout)
         elif 'overprint mode not set' in stdout:
             # Unless someone is going to print PDF/A documents on a
diff --git a/ocrmypdf/exec/tesseract.py b/ocrmypdf/exec/tesseract.py
index 3debdc83..30ce5b92 100644
--- a/ocrmypdf/exec/tesseract.py
+++ b/ocrmypdf/exec/tesseract.py
@@ -186,6 +186,8 @@ def tesseract_log_output(log, stdout, input_file):
             log.warning(prefix + "unsure about page orientation")
         elif 'error' in line.lower() or 'exception' in line.lower():
             log.error(prefix + line.strip())
+        elif 'warning' in line.lower():
+            log.warning(prefix + line.strip())
         elif 'read_params_file' in line.lower():
             log.error(prefix + line.strip())
         else: