diff --git a/examples/ncss/NCSS_Cartopy_Example.py b/examples/ncss/NCSS_Cartopy_Example.py
index c2ebbe62d..5f179aee6 100644
--- a/examples/ncss/NCSS_Cartopy_Example.py
+++ b/examples/ncss/NCSS_Cartopy_Example.py
@@ -111,7 +111,7 @@
 plt.colorbar(cf, ax=ax, fraction=0.032)
 
 # Make a title with the time value
-ax.set_title(f'Temperature forecast (\u00b0F) for {time_val:%d %B %Y %H:%MZ}',
+ax.set_title(f'Temperature forecast (\u00b0F) for {time_val: %d %B %Y %H:%MZ}',
              fontsize=20)
 
 # Plot markers for each lat/long to show grid points for 0.25 deg GFS
diff --git a/src/siphon/cdmr/ncstream.py b/src/siphon/cdmr/ncstream.py
index bbffca5fe..9f52dd243 100644
--- a/src/siphon/cdmr/ncstream.py
+++ b/src/siphon/cdmr/ncstream.py
@@ -140,7 +140,7 @@ def read_messages(fobj, magic_table):
         if func is not None:
             messages.append(func(fobj))
         else:
-            log.error('Unknown magic: ' + str(' '.join(f'{b:02x}'
+            log.error('Unknown magic: ' + str(' '.join(f'{b: 02x}'
                                                        for b in bytearray(magic))))
 
     return messages
diff --git a/src/siphon/http_util.py b/src/siphon/http_util.py
index d89ac2d64..1bc5d630d 100644
--- a/src/siphon/http_util.py
+++ b/src/siphon/http_util.py
@@ -490,7 +490,7 @@ def get(self, path, params=None):
             else:
                 text = resp.text
             raise requests.HTTPError(f'Error accessing {resp.request.url}\n'
-                                     f'Server Error ({resp.status_code:d}: {text})')
+                                     f'Server Error ({resp.status_code: d}: {text})')
         return resp
 
     def _get_metadata(self):
diff --git a/src/siphon/simplewebservice/iastate.py b/src/siphon/simplewebservice/iastate.py
index 1b54b52e0..92d908fbe 100644
--- a/src/siphon/simplewebservice/iastate.py
+++ b/src/siphon/simplewebservice/iastate.py
@@ -176,7 +176,7 @@ def _get_data_raw(self, time, site_id, pressure=None):
         if not (json_data['profiles'] and json_data['profiles'][0]['profile']):
             message = 'No data available '
             if time is not None:
-                message += f'for {time:%Y-%m-%d %HZ} '
+                message += f'for {time: %Y-%m-%d %HZ} '
             if site_id is not None:
                 message += f'for station {site_id}'
             if pressure is not None:
diff --git a/tests/test_catalog.py b/tests/test_catalog.py
index 53168f835..93eb53291 100644
--- a/tests/test_catalog.py
+++ b/tests/test_catalog.py
@@ -407,4 +407,4 @@ def test_nasa_hyrax_dataset():
 
     # Checks #gh-759
     assert len(cat.datasets) == 161
-    assert 'epic_1b_20240413222222_03.h5' in cat.datasets
\ No newline at end of file
+    assert 'epic_1b_20240413222222_03.h5' in cat.datasets