diff --git a/main.py b/main.py
index ee6fee4..31fc79a 100755
--- a/main.py
+++ b/main.py
@@ -463,10 +463,11 @@ def get_articles_without_images(
             if articles_without_images:
                 error = (
                     "Wikipedia stopped responding before the whole category could "
-                    "be checked. Showing partial results; please try again."
+                    "be checked. Showing partial results. "
+                    f"Wikipedia API error: {e}"
                 )
             else:
-                error = "Unable to load articles from Wikipedia. Please try again."
+                error = f"Unable to load articles. Wikipedia API error: {e}"
             break
 
         pages = data.get("query", {}).get("pages", {})
diff --git a/tests/test_category_search.py b/tests/test_category_search.py
index 8a22e1f..6a6072a 100644
--- a/tests/test_category_search.py
+++ b/tests/test_category_search.py
@@ -12,7 +12,7 @@ def test_api_failure_is_not_reported_as_an_empty_success():
         result = get_articles_without_images("Category:Example")
 
     assert result.articles == []
-    assert result.error == "Unable to load articles from Wikipedia. Please try again."
+    assert result.error == "Unable to load articles. Wikipedia API error: offline"
 
 
 def test_api_error_response_is_not_reported_as_an_empty_success():
@@ -31,7 +31,10 @@ def test_api_error_response_is_not_reported_as_an_empty_success():
         result = get_articles_without_images("Category:Example")
 
     assert result.articles == []
-    assert result.error == "Unable to load articles from Wikipedia. Please try again."
+    assert result.error == (
+        "Unable to load articles. Wikipedia API error: "
+        "readonly: Wikipedia is read-only"
+    )
 
 
 def test_api_failure_after_results_marks_them_as_partial():
@@ -63,13 +66,14 @@ def test_api_failure_after_results_marks_them_as_partial():
     assert [article.title for article in result.articles] == ["No image"]
     assert result.error is not None
     assert "partial results" in result.error
+    assert "offline" in result.error
 
 
 def test_category_page_does_not_claim_success_after_api_failure():
     result = CategoryResult(
         articles=[],
         gcmcontinue=None,
-        error="Unable to load articles from Wikipedia. Please try again.",
+        error="Unable to load articles. Wikipedia API error: test failure",
     )
 
     with (
@@ -81,5 +85,5 @@ def test_category_page_does_not_claim_success_after_api_failure():
 
     page = response.get_data(as_text=True)
     assert response.status_code == 200
-    assert "Unable to load articles from Wikipedia" in page
+    assert "Wikipedia API error: test failure" in page
     assert "All articles in this category have images" not in page