diff --git a/test/runtests.jl b/test/runtests.jl
index f9e4ff1..14702d4 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -4,104 +4,107 @@ using MarketDataFeeds
 using MarketDataFeeds.HTTP, MarketDataFeeds.JSON
 
 # POLYGON
-@assert haskey(ENV, "POLYGON_API_KEY") "please provide Polygon.io API key in POLYGON_API_KEY env var"
+if haskey(ENV, "POLYGON_API_KEY")
+    date_from = today() - Month(2)
+    date_to = date_from + Month(1)
 
-date_from = today() - Month(2)
-date_to = date_from + Month(1)
+    tmp_dir = mktempdir()
 
-tmp_dir = mktempdir()
+    aggregates(; ticker="AAPL", timespan="minute", from=1665791940000)
+    aggregates_h5(; path="$tmp_dir/AAPL-d.h5", ticker="AAPL", timespan="minute", from=date_from, to=date_to)
 
-aggregates(; ticker="AAPL", timespan="minute", from=1665791940000)
-aggregates_h5(; path="$tmp_dir/AAPL-d.h5", ticker="AAPL", timespan="minute", from=date_from, to=date_to)
+    from, to = HDF5.h5open("$tmp_dir/AAPL-d.h5") do f
+        HDF5.read_attribute(f, "from"), HDF5.read_attribute(f, "to")
+    end
 
-from, to = HDF5.h5open("$tmp_dir/AAPL-d.h5") do f
-    HDF5.read_attribute(f, "from"), HDF5.read_attribute(f, "to")
-end
+    sync!("$tmp_dir/AAPL-d.h5")
 
-sync!("$tmp_dir/AAPL-d.h5")
+    HDF5.h5open("$tmp_dir/AAPL-d.h5") do f
+        t_index = findfirst(==("t"), HDF5.read_attribute(f, "fields"))
+        @test !isnothing(t_index)
+        @test f["bars"][][begin, t_index] == HDF5.read_attribute(f, "from") == from
+        @test f["bars"][][end, t_index] == HDF5.read_attribute(f, "to")
+    end
 
-HDF5.h5open("$tmp_dir/AAPL-d.h5") do f
-    t_index = findfirst(==("t"), HDF5.read_attribute(f, "fields"))
-    @test !isnothing(t_index)
-    @test f["bars"][][begin, t_index] == HDF5.read_attribute(f, "from") == from
-    @test f["bars"][][end, t_index] == HDF5.read_attribute(f, "to")
-end
+    filter_times("$tmp_dir/AAPL-d-filtered.h5", "$tmp_dir/AAPL-d.h5"; from, to)
 
-filter_times("$tmp_dir/AAPL-d-filtered.h5", "$tmp_dir/AAPL-d.h5"; from, to)
+    from_, to_ = HDF5.h5open("$tmp_dir/AAPL-d-filtered.h5") do f
+        HDF5.read_attribute(f, "from"), HDF5.read_attribute(f, "to")
+    end
 
-from_, to_ = HDF5.h5open("$tmp_dir/AAPL-d-filtered.h5") do f
-    HDF5.read_attribute(f, "from"), HDF5.read_attribute(f, "to")
-end
-
-@test from_ == from
-@test to_ == to
+    @test from_ == from
+    @test to_ == to
+else @warn "polygon.io API key not found (`POLYGON_API_KEY` environment variable); skipping test" end
 
 # IBKR
+ibkr_status = if haskey(ENV, "IBKR_HOST")
+    # check if session is authenticated
+    response = HTTP.get(ENV["IBKR_HOST"] * "/tickle")
+    body = JSON.parse(String(response.body))
+    body["iserver"]["authStatus"]["authenticated"]
+else false end
 
-# check if session is authenticated
-response = HTTP.get(ENV["IBKR_HOST"] * "/tickle")
-body = JSON.parse(String(response.body))
-@assert body["iserver"]["authStatus"]["authenticated"] "IBKR session not authenticated"
-
-# snapshots
-snapshot(; conids=["5049", "1448477", "3691937", "9705", "4901", "87335484", "6437", "459530964", "10098", "2585769"])
+if ibkr_status
+    # snapshots
+    snapshot(; conids=["5049", "1448477", "3691937", "9705", "4901", "87335484", "6437", "459530964", "10098", "2585769"])
 
-# aggregates
-period = "5d"
-date_to = datetime2unix(now() - Day(1)) * 1000
+    # aggregates
+    period = "5d"
+    date_to = datetime2unix(now() - Day(1)) * 1000
 
-aggregates_h5("IBKR"; path="$tmp_dir/5049-h-1.h5", conid="5049", period, bar="h")
+    aggregates_h5("IBKR"; path="$tmp_dir/5049-h-1.h5", conid="5049", period, bar="h")
 
-attributes, data = aggregates("IBKR"; conid="5049", period, bar="h")
+    attributes, data = aggregates("IBKR"; conid="5049", period, bar="h")
 
-t_ix = indexin(("t",), attributes.fields)[1]
-ixs = filter(x -> data[x, t_ix] <= date_to, 1:size(data, 1))
-data = Matrix(@view data[ixs, :])
-attr_fields = setdiff(keys(attributes), (:to,))
-attributes_ = (; (a => attributes[a] for a in attr_fields)..., to=data[end, t_ix])
+    t_ix = indexin(("t",), attributes.fields)[1]
+    ixs = filter(x -> data[x, t_ix] <= date_to, 1:size(data, 1))
+    data = Matrix(@view data[ixs, :])
+    attr_fields = setdiff(keys(attributes), (:to,))
+    attributes_ = (; (a => attributes[a] for a in attr_fields)..., to=data[end, t_ix])
 
-# write subset
-MarketDataFeeds.create_dataset("$tmp_dir/5049-h-2.h5", attributes_, data;)
- 
-from, to = HDF5.h5open("$tmp_dir/5049-h-2.h5") do f
-    HDF5.read_attribute(f, "from"), HDF5.read_attribute(f, "to")
-end
+    # write subset
+    MarketDataFeeds.create_dataset("$tmp_dir/5049-h-2.h5", attributes_, data;)
+    
+    from, to = HDF5.h5open("$tmp_dir/5049-h-2.h5") do f
+        HDF5.read_attribute(f, "from"), HDF5.read_attribute(f, "to")
+    end
 
-# append latest data
-sync!("$tmp_dir/5049-h-2.h5")
+    # append latest data
+    sync!("$tmp_dir/5049-h-2.h5")
 
-HDF5.h5open("$tmp_dir/5049-h-2.h5") do f
-    t_index = findfirst(==("t"), HDF5.read_attribute(f, "fields"))
-    @test !isnothing(t_index)
-    @test f["bars"][][begin, t_index] == HDF5.read_attribute(f, "from") == from
-    @test f["bars"][][end, t_index] == HDF5.read_attribute(f, "to")
-end
+    HDF5.h5open("$tmp_dir/5049-h-2.h5") do f
+        t_index = findfirst(==("t"), HDF5.read_attribute(f, "fields"))
+        @test !isnothing(t_index)
+        @test f["bars"][][begin, t_index] == HDF5.read_attribute(f, "from") == from
+        @test f["bars"][][end, t_index] == HDF5.read_attribute(f, "to")
+    end
 
-# filter bars
-filter_times("$tmp_dir/5049-h-3.h5", "$tmp_dir/5049-h-2.h5"; from, to)
+    # filter bars
+    filter_times("$tmp_dir/5049-h-3.h5", "$tmp_dir/5049-h-2.h5"; from, to)
 
-from_, to_ = HDF5.h5open("$tmp_dir/5049-h-3.h5") do f
-    HDF5.read_attribute(f, "from"), HDF5.read_attribute(f, "to")
-end
+    from_, to_ = HDF5.h5open("$tmp_dir/5049-h-3.h5") do f
+        HDF5.read_attribute(f, "from"), HDF5.read_attribute(f, "to")
+    end
 
-@test from_ == from
-@test to_ == to
+    @test from_ == from
+    @test to_ == to
 
-# convert between providers
-date_from = today() - Month(2)
-date_to = date_from + Month(1)
+    # convert between providers
+    date_from = today() - Month(2)
+    date_to = date_from + Month(1)
 
-aggregates_h5(; path="$tmp_dir/AAPL-d-1.h5", ticker="AAPL", timespan="day", from=date_from, to=date_to)
+    aggregates_h5(; path="$tmp_dir/AAPL-d-1.h5", ticker="AAPL", timespan="day", from=date_from, to=date_to)
 
-to = HDF5.h5open(f -> HDF5.read_attribute(f, "to"), "$tmp_dir/AAPL-d-1.h5")
+    to = HDF5.h5open(f -> HDF5.read_attribute(f, "to"), "$tmp_dir/AAPL-d-1.h5")
 
-l = readlines("conids.txt")
-conids = Dict((Pair(split(l, ';')...) for l in l))
+    l = readlines("conids.txt")
+    conids = Dict((Pair(split(l, ';')...) for l in l))
 
-change_provider!("$tmp_dir/AAPL-d-1.h5"; conids)
-sync!("$tmp_dir/AAPL-d-1.h5")
+    change_provider!("$tmp_dir/AAPL-d-1.h5"; conids)
+    sync!("$tmp_dir/AAPL-d-1.h5")
 
-to_ = HDF5.h5open(f -> HDF5.read_attribute(f, "to"), "$tmp_dir/AAPL-d-1.h5")
+    to_ = HDF5.h5open(f -> HDF5.read_attribute(f, "to"), "$tmp_dir/AAPL-d-1.h5")
 
-# test if new data was fetched
-@test to_ > to
\ No newline at end of file
+    # test if new data was fetched
+    @test to_ > to
+else @warn "`IBKR_HOST` environment variable not found or IBKR session not authenticated; skipping tests" end
\ No newline at end of file