diff --git a/x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/analysis/Verifier.java b/x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/analysis/Verifier.java
index f5725d3747b0e..87efa883af74d 100644
--- a/x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/analysis/Verifier.java
+++ b/x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/analysis/Verifier.java
@@ -672,7 +672,7 @@ private static void checkFullTextQueryFunctions(LogicalPlan plan, Set<Failure> f
                         failures.add(
                             fail(
                                 plan,
-                                "Full text functions cannot be used after {}",
+                                "full text functions cannot be used after {}",
                                 lp.sourceText().split(" ")[0].toUpperCase(Locale.ROOT)
                             )
                         );
@@ -681,7 +681,7 @@ private static void checkFullTextQueryFunctions(LogicalPlan plan, Set<Failure> f
             }
         } else {
             plan.forEachExpression(FullTextFunction.class, ftf -> {
-                failures.add(fail(ftf, "Full text functions are only supported in WHERE commands"));
+                failures.add(fail(ftf, "full text functions are only supported in WHERE commands"));
             });
         }
     }
diff --git a/x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/analysis/VerifierTests.java b/x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/analysis/VerifierTests.java
index 9422697691b76..56c2568b5bccf 100644
--- a/x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/analysis/VerifierTests.java
+++ b/x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/analysis/VerifierTests.java
@@ -1094,58 +1094,58 @@ public void testQueryStringFunctionsNotAllowedAfterCommands() throws Exception {
         assumeTrue("skipping because QSTR is not enabled", EsqlCapabilities.Cap.QSTR_FUNCTION.isEnabled());
 
         // Source commands
-        assertEquals("1:13: Full text functions cannot be used after SHOW", error("show info | where qstr(\"8.16.0\")"));
-        assertEquals("1:17: Full text functions cannot be used after ROW", error("row a= \"Anna\" | where qstr(\"Anna\")"));
+        assertEquals("1:13: full text functions cannot be used after SHOW", error("show info | where qstr(\"8.16.0\")"));
+        assertEquals("1:17: full text functions cannot be used after ROW", error("row a= \"Anna\" | where qstr(\"Anna\")"));
 
         // Processing commands
         assertEquals(
-            "1:43: Full text functions cannot be used after DISSECT",
+            "1:43: full text functions cannot be used after DISSECT",
             error("from test | dissect first_name \"%{foo}\" | where qstr(\"Connection\")")
         );
-        assertEquals("1:27: Full text functions cannot be used after DROP", error("from test | drop emp_no | where qstr(\"Anna\")"));
+        assertEquals("1:27: full text functions cannot be used after DROP", error("from test | drop emp_no | where qstr(\"Anna\")"));
         assertEquals(
-            "1:71: Full text functions cannot be used after ENRICH",
+            "1:71: full text functions cannot be used after ENRICH",
             error("from test | enrich languages on languages with lang = language_name | where qstr(\"Anna\")")
         );
-        assertEquals("1:26: Full text functions cannot be used after EVAL", error("from test | eval z = 2 | where qstr(\"Anna\")"));
+        assertEquals("1:26: full text functions cannot be used after EVAL", error("from test | eval z = 2 | where qstr(\"Anna\")"));
         assertEquals(
-            "1:44: Full text functions cannot be used after GROK",
+            "1:44: full text functions cannot be used after GROK",
             error("from test | grok last_name \"%{WORD:foo}\" | where qstr(\"Anna\")")
         );
-        assertEquals("1:27: Full text functions cannot be used after KEEP", error("from test | keep emp_no | where qstr(\"Anna\")"));
-        assertEquals("1:24: Full text functions cannot be used after LIMIT", error("from test | limit 10 | where qstr(\"Anna\")"));
+        assertEquals("1:27: full text functions cannot be used after KEEP", error("from test | keep emp_no | where qstr(\"Anna\")"));
+        assertEquals("1:24: full text functions cannot be used after LIMIT", error("from test | limit 10 | where qstr(\"Anna\")"));
         assertEquals(
-            "1:35: Full text functions cannot be used after MV_EXPAND",
+            "1:35: full text functions cannot be used after MV_EXPAND",
             error("from test | mv_expand last_name | where qstr(\"Anna\")")
         );
         assertEquals(
-            "1:45: Full text functions cannot be used after RENAME",
+            "1:45: full text functions cannot be used after RENAME",
             error("from test | rename last_name as full_name | where qstr(\"Anna\")")
         );
         assertEquals(
-            "1:52: Full text functions cannot be used after STATS",
+            "1:52: full text functions cannot be used after STATS",
             error("from test | STATS c = COUNT(emp_no) BY languages | where qstr(\"Anna\")")
         );
 
         // Some combination of processing commands
         assertEquals(
-            "1:38: Full text functions cannot be used after LIMIT",
+            "1:38: full text functions cannot be used after LIMIT",
             error("from test | keep emp_no | limit 10 | where qstr(\"Anna\")")
         );
         assertEquals(
-            "1:46: Full text functions cannot be used after MV_EXPAND",
+            "1:46: full text functions cannot be used after MV_EXPAND",
             error("from test | limit 10 | mv_expand last_name | where qstr(\"Anna\")")
         );
         assertEquals(
-            "1:52: Full text functions cannot be used after KEEP",
+            "1:52: full text functions cannot be used after KEEP",
             error("from test | mv_expand last_name | keep last_name | where qstr(\"Anna\")")
         );
         assertEquals(
-            "1:77: Full text functions cannot be used after RENAME",
+            "1:77: full text functions cannot be used after RENAME",
             error("from test | STATS c = COUNT(emp_no) BY languages | rename c as total_emps | where qstr(\"Anna\")")
         );
         assertEquals(
-            "1:54: Full text functions cannot be used after KEEP",
+            "1:54: full text functions cannot be used after KEEP",
             error("from test | rename last_name as name | keep emp_no | where qstr(\"Anna\")")
         );
     }
@@ -1153,11 +1153,11 @@ public void testQueryStringFunctionsNotAllowedAfterCommands() throws Exception {
     public void testQueryStringFunctionsOnlyAllowedInWhere() throws Exception {
         assumeTrue("skipping because QSTR is not enabled", EsqlCapabilities.Cap.QSTR_FUNCTION.isEnabled());
 
-        assertEquals("1:22: Full text functions are only supported in WHERE commands", error("from test | eval y = qstr(\"Anna\")"));
-        assertEquals("1:18: Full text functions are only supported in WHERE commands", error("from test | sort qstr(\"Connection\") asc"));
-        assertEquals("1:5: Full text functions are only supported in WHERE commands", error("row qstr(\"Connection\")"));
+        assertEquals("1:22: full text functions are only supported in WHERE commands", error("from test | eval y = qstr(\"Anna\")"));
+        assertEquals("1:18: full text functions are only supported in WHERE commands", error("from test | sort qstr(\"Connection\") asc"));
+        assertEquals("1:5: full text functions are only supported in WHERE commands", error("row qstr(\"Connection\")"));
         assertEquals(
-            "1:23: Full text functions are only supported in WHERE commands",
+            "1:23: full text functions are only supported in WHERE commands",
             error("from test | STATS c = qstr(\"foo\") BY languages")
         );
     }