diff --git a/CHANGELOG.md b/CHANGELOG.md
index 623042488ca1614a734eed1f16e840609be3a1b9..4f8b988337ddec616df0da2f3d4f30fd97e85e71 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@ The format is based on [keep a changelog](http://keepachangelog.com) and this pr
 - Handle Google IAP validation token caching when using credential overrides.
 - More graceful handling of no-op authoritative storage delete operations.
 - Ensure rank cache is correctly updated when joining tournaments.
+- Ensure default parameters for tournament listings are consistent between API and runtimes.
 
 ## [3.14.0] - 2022-10-14
 ### Added
diff --git a/server/api_tournament.go b/server/api_tournament.go
index 19b0f65d854f79b2ac838b552119c7f941de5e61..253af9379f04457b9ba8256a396a39deb0576cc6 100644
--- a/server/api_tournament.go
+++ b/server/api_tournament.go
@@ -214,12 +214,12 @@ func (s *ApiServer) ListTournaments(ctx context.Context, in *api.ListTournaments
 	}
 
 	// If startTime and endTime are both not set the API will only return active or future tournaments.
-	startTime := -1 // don't include start time in query
+	startTime := -1 // Don't include start time in query by default.
 	if in.GetStartTime() != nil {
 		startTime = int(in.GetStartTime().GetValue())
 	}
 
-	endTime := -1 // don't include end time in query
+	endTime := -1 // Don't include end time in query by default.
 	if in.GetEndTime() != nil {
 		endTime = int(in.GetEndTime().GetValue())
 		if endTime != 0 && endTime < startTime { // Allow 0 value to explicitly request tournaments with no end time set.
diff --git a/server/runtime_javascript_nakama.go b/server/runtime_javascript_nakama.go
index 836f264b1521b676ca0b790abc9e21429cc0b6f4..94e3e4575eaeac05ac1cc9cf69da99a2830d161c 100644
--- a/server/runtime_javascript_nakama.go
+++ b/server/runtime_javascript_nakama.go
@@ -6182,7 +6182,7 @@ func (n *runtimeJavascriptNakamaModule) tournamentList(r *goja.Runtime) func(goj
 			panic(r.NewTypeError("category end must be >= category start"))
 		}
 
-		startTime := 0
+		startTime := -1
 		if f.Argument(2) != goja.Undefined() && f.Argument(2) != goja.Null() {
 			startTime = int(getJsInt(r, f.Argument(2)))
 			if startTime < 0 {
@@ -6190,7 +6190,7 @@ func (n *runtimeJavascriptNakamaModule) tournamentList(r *goja.Runtime) func(goj
 			}
 		}
 
-		endTime := 0
+		endTime := -1
 		if f.Argument(3) != goja.Undefined() && f.Argument(3) != goja.Null() {
 			endTime = int(getJsInt(r, f.Argument(3)))
 			if endTime < 0 {
diff --git a/server/runtime_lua_nakama.go b/server/runtime_lua_nakama.go
index c9c1787e5e8c4e4047371b61d7b7be1fc84f1ab3..d44c7dec18ef56856422f940f7edcdcdbfcb2cee 100644
--- a/server/runtime_lua_nakama.go
+++ b/server/runtime_lua_nakama.go
@@ -7720,15 +7720,30 @@ func (n *RuntimeLuaNakamaModule) tournamentList(l *lua.LState) int {
 		l.ArgError(2, "categoryEnd must be >= categoryStart")
 		return 0
 	}
-	startTime := l.OptInt(3, 0)
-	if startTime < 0 {
-		l.ArgError(3, "startTime must be >= 0")
-		return 0
+
+	startTime := -1
+	if v := l.Get(3); v.Type() != lua.LTNil {
+		if v.Type() != lua.LTNumber {
+			l.ArgError(3, "startTime must be >= 0")
+			return 0
+		}
+		startTime = int(lua.LVAsNumber(v))
+		if startTime < 0 {
+			l.ArgError(3, "startTime must be >= 0")
+			return 0
+		}
 	}
-	endTime := l.OptInt(4, 0)
-	if endTime < 0 {
-		l.ArgError(4, "endTime must be >= 0")
-		return 0
+	endTime := -1
+	if v := l.Get(4); v.Type() != lua.LTNil {
+		if v.Type() != lua.LTNumber {
+			l.ArgError(4, "endTime must be >= 0")
+			return 0
+		}
+		endTime = int(lua.LVAsNumber(v))
+		if endTime < 0 {
+			l.ArgError(4, "endTime must be >= 0")
+			return 0
+		}
 	}
 	if startTime > endTime {
 		l.ArgError(4, "endTime must be >= startTime")