diff --git a/notification/rule/http_test.go b/notification/rule/http_test.go
index f6a85a196ba..5607ba524b3 100644
--- a/notification/rule/http_test.go
+++ b/notification/rule/http_test.go
@@ -33,7 +33,7 @@ crit = statuses
 		(r["_level"] == "crit"))
 all_statuses = crit
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: endpoint(mapFn: (r) => {
@@ -102,7 +102,7 @@ crit = statuses
 		(r["_level"] == "crit"))
 all_statuses = crit
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: endpoint(mapFn: (r) => {
@@ -177,7 +177,7 @@ crit = statuses
 		(r["_level"] == "crit"))
 all_statuses = crit
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: endpoint(mapFn: (r) => {
@@ -250,7 +250,7 @@ crit = statuses
 		(r["_level"] == "crit"))
 all_statuses = crit
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 5s)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 5s)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: endpoint(mapFn: (r) => {
diff --git a/notification/rule/pagerduty_test.go b/notification/rule/pagerduty_test.go
index 1515f7dae44..97d1cef34ed 100644
--- a/notification/rule/pagerduty_test.go
+++ b/notification/rule/pagerduty_test.go
@@ -83,7 +83,7 @@ crit = statuses
 		(r["_level"] == "crit"))
 all_statuses = crit
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: pagerduty_endpoint(mapFn: (r) =>
@@ -166,7 +166,7 @@ info_to_crit = statuses
 	|> monitor["stateChanges"](fromLevel: "info", toLevel: "crit")
 all_statuses = info_to_crit
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: pagerduty_endpoint(mapFn: (r) =>
@@ -256,7 +256,7 @@ ok_to_warn = statuses
 all_statuses = union(tables: [crit, ok_to_warn])
 	|> sort(columns: ["_time"])
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: pagerduty_endpoint(mapFn: (r) =>
diff --git a/notification/rule/rule.go b/notification/rule/rule.go
index ec875b48360..7482f3f07a8 100644
--- a/notification/rule/rule.go
+++ b/notification/rule/rule.go
@@ -136,16 +136,17 @@ func (b *Base) generateLevelChecks() []ast.Statement {
 	now := flux.Call(flux.Identifier("now"), flux.Object())
 	timeFilter := flux.Function(
 		flux.FunctionParams("r"),
-		flux.GreaterThan(
-			flux.Member("r", "_time"),
-			flux.Call(
+		&ast.BinaryExpression{
+			Operator: ast.GreaterThanEqualOperator,
+			Left:     flux.Member("r", "_time"),
+			Right: flux.Call(
 				flux.Member("experimental", "subDuration"),
 				flux.Object(
 					flux.Property("from", now),
 					flux.Property("d", (*ast.DurationLiteral)(b.Every)),
 				),
 			),
-		),
+		},
 	)
 
 	var pipe *ast.PipeExpression
diff --git a/notification/rule/slack_test.go b/notification/rule/slack_test.go
index 995f33c8b12..88d4698edfb 100644
--- a/notification/rule/slack_test.go
+++ b/notification/rule/slack_test.go
@@ -61,7 +61,7 @@ any = statuses
 		(true))
 all_statuses = any
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: slack_endpoint(mapFn: (r) =>
@@ -133,7 +133,7 @@ info_to_warn = statuses
 all_statuses = union(tables: [crit, info_to_warn])
 	|> sort(columns: ["_time"])
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: slack_endpoint(mapFn: (r) =>
@@ -210,7 +210,7 @@ info_to_warn = statuses
 all_statuses = union(tables: [crit, info_to_warn])
 	|> sort(columns: ["_time"])
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: slack_endpoint(mapFn: (r) =>
@@ -289,7 +289,7 @@ info_to_warn = statuses
 all_statuses = union(tables: [crit, info_to_warn])
 	|> sort(columns: ["_time"])
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: slack_endpoint(mapFn: (r) =>
diff --git a/notification/rule/telegram_test.go b/notification/rule/telegram_test.go
index 8dae3b0fa98..05643bb429d 100644
--- a/notification/rule/telegram_test.go
+++ b/notification/rule/telegram_test.go
@@ -125,7 +125,7 @@ crit = statuses
 		(r["_level"] == "crit"))
 all_statuses = crit
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: telegram_endpoint(mapFn: (r) =>
@@ -197,7 +197,7 @@ any = statuses
 		(true))
 all_statuses = any
 	|> filter(fn: (r) =>
-		(r["_time"] > experimental["subDuration"](from: now(), d: 1h)))
+		(r["_time"] >= experimental["subDuration"](from: now(), d: 1h)))
 
 all_statuses
 	|> monitor["notify"](data: notification, endpoint: telegram_endpoint(mapFn: (r) =>