diff --git a/client/src/components/History/model/queries.js b/client/src/components/History/model/queries.js
index 6a643409176..1a5f684c7dd 100644
--- a/client/src/components/History/model/queries.js
+++ b/client/src/components/History/model/queries.js
@@ -47,21 +47,11 @@ function buildLegacyQueryStringFrom(filters) {
 
 function buildLegacyParam(fields = {}) {
     return Object.keys(fields).reduce((result, key) => {
-        result[key] = pythonBooleanFormat(fields[key]);
+        result[key] = fields[key];
         return result;
     }, {});
 }
 
-function pythonBooleanFormat(val) {
-    if (val === true) {
-        return "True";
-    }
-    if (val === false) {
-        return "False";
-    }
-    return val;
-}
-
 /**
  * Some of the current endpoints don't accept JSON, so we need to
  * do some massaging to send in old form post data.
diff --git a/client/src/store/historyStore/historyItemsFiltering.js b/client/src/store/historyStore/historyItemsFiltering.js
index ab947bc510a..01e7ffef2ee 100644
--- a/client/src/store/historyStore/historyItemsFiltering.js
+++ b/client/src/store/historyStore/historyItemsFiltering.js
@@ -20,9 +20,9 @@ function toLower(value) {
     return String(value).toLowerCase();
 }
 
-/** Converts user input to python boolean. */
-function toBoolPython(value) {
-    return toLower(value) == "true" ? "True" : "False";
+/** Converts user input to boolean. */
+function toBool(value) {
+    return toLower(value) == "true";
 }
 
 /** Converts user input to lower case and strips quotation marks. */
@@ -97,14 +97,14 @@ const validFilters = {
     create_time_gt: compare("create_time", "gt", toDate),
     create_time_le: compare("create_time", "le", toDate),
     create_time_lt: compare("create_time", "lt", toDate),
-    deleted: equals("deleted", "deleted", toBoolPython),
+    deleted: equals("deleted", "deleted", toBool),
     extension: equals("extension"),
     hid: equals("hid"),
     hid_ge: compare("hid", "ge"),
     hid_gt: compare("hid", "gt"),
     hid_le: compare("hid", "le"),
     hid_lt: compare("hid", "lt"),
-    visible: equals("visible", "visible", toBoolPython),
+    visible: equals("visible", "visible", toBool),
     name: contains("name"),
     state: equals("state"),
     tag: contains("tags", "tag"),
diff --git a/client/src/store/historyStore/historyItemsFiltering.test.js b/client/src/store/historyStore/historyItemsFiltering.test.js
index 850bcf2934f..a18df29032c 100644
--- a/client/src/store/historyStore/historyItemsFiltering.test.js
+++ b/client/src/store/historyStore/historyItemsFiltering.test.js
@@ -55,8 +55,8 @@ describe("historyItemsFiltering", () => {
             expect(queryDict["state-eq"]).toBe("success");
             expect(queryDict["extension-eq"]).toBe("ext");
             expect(queryDict["tag"]).toBe("first");
-            expect(queryDict["deleted"]).toBe("False");
-            expect(queryDict["visible"]).toBe("True");
+            expect(queryDict["deleted"]).toBe(false);
+            expect(queryDict["visible"]).toBe(true);
         });
     });
     test("validate filtering of a history item", () => {
diff --git a/lib/galaxy/managers/base.py b/lib/galaxy/managers/base.py
index 72175120ecc..14f55897f0e 100644
--- a/lib/galaxy/managers/base.py
+++ b/lib/galaxy/managers/base.py
@@ -1252,9 +1252,9 @@ def parse_bool(bool_string: Union[str, bool]) -> bool:
     Parse a boolean from a string.
     """
     # Be strict here to remove complexity of options (but allow already parsed).
-    if bool_string in ("True", True):
+    if bool_string in ("True", "true", True):
         return True
-    if bool_string in ("False", False):
+    if bool_string in ("False", "false", False):
         return False
     raise ValueError(f"invalid boolean: {bool_string}")
 
diff --git a/test/unit/app/managers/test_HistoryManager.py b/test/unit/app/managers/test_HistoryManager.py
index 22897ce87e4..1298a8a19fb 100644
--- a/test/unit/app/managers/test_HistoryManager.py
+++ b/test/unit/app/managers/test_HistoryManager.py
@@ -748,7 +748,7 @@ class HistoryFiltersTestCase(BaseTestCase):
             exceptions.RequestParameterInvalidException,
             self.filter_parser.parse_filters,
             [
-                ("deleted", "eq", "true"),
+                ("deleted", "eq", "wot"),
             ],
         )