diff --git a/tests/cassettes/test_tracer/test_init_with_different_mixes.yaml b/tests/cassettes/test_tracer/test_init_with_different_mixes.yaml
new file mode 100644
index 0000000..936c207
--- /dev/null
+++ b/tests/cassettes/test_tracer/test_init_with_different_mixes.yaml
@@ -0,0 +1,170 @@
+interactions:
+- request:
+    body: '{"max_tokens": 1024, "messages": [{"role": "user", "content": "Hello, Claude"}],
+      "model": "claude-3-opus-20240229"}'
+    headers:
+      accept:
+      - application/json
+      accept-encoding:
+      - gzip, deflate
+      anthropic-version:
+      - '2023-06-01'
+      connection:
+      - keep-alive
+      content-length:
+      - '115'
+      content-type:
+      - application/json
+      host:
+      - api.anthropic.com
+      user-agent:
+      - Anthropic/Python 0.29.2
+      x-stainless-arch:
+      - arm64
+      x-stainless-async:
+      - 'false'
+      x-stainless-lang:
+      - python
+      x-stainless-os:
+      - MacOS
+      x-stainless-package-version:
+      - 0.29.2
+      x-stainless-runtime:
+      - CPython
+      x-stainless-runtime-version:
+      - 3.11.8
+    method: POST
+    uri: https://api.anthropic.com/v1/messages
+  response:
+    body:
+      string: !!binary |
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+    headers:
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+      Server:
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+      - chunked
+      X-Robots-Tag:
+      - none
+      anthropic-ratelimit-requests-limit:
+      - '5'
+      anthropic-ratelimit-requests-remaining:
+      - '4'
+      anthropic-ratelimit-requests-reset:
+      - '2024-09-05T13:46:43Z'
+      anthropic-ratelimit-tokens-limit:
+      - '10000'
+      anthropic-ratelimit-tokens-remaining:
+      - '10000'
+      anthropic-ratelimit-tokens-reset:
+      - '2024-09-05T13:46:39Z'
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+      - req_01Bvsh4NeRG6xmqGh3scgoqS
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+      message: OK
+- request:
+    body: '{"max_tokens": 1024, "messages": [{"role": "user", "content": "Hello, Claude"}],
+      "model": "claude-3-opus-20240229"}'
+    headers:
+      accept:
+      - application/json
+      accept-encoding:
+      - gzip, deflate
+      anthropic-version:
+      - '2023-06-01'
+      connection:
+      - keep-alive
+      content-length:
+      - '115'
+      content-type:
+      - application/json
+      host:
+      - api.anthropic.com
+      user-agent:
+      - Anthropic/Python 0.29.2
+      x-stainless-arch:
+      - arm64
+      x-stainless-async:
+      - 'false'
+      x-stainless-lang:
+      - python
+      x-stainless-os:
+      - MacOS
+      x-stainless-package-version:
+      - 0.29.2
+      x-stainless-runtime:
+      - CPython
+      x-stainless-runtime-version:
+      - 3.11.8
+    method: POST
+    uri: https://api.anthropic.com/v1/messages
+  response:
+    body:
+      string: !!binary |
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+      Server:
+      - cloudflare
+      Transfer-Encoding:
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+      - none
+      anthropic-ratelimit-requests-limit:
+      - '5'
+      anthropic-ratelimit-requests-remaining:
+      - '3'
+      anthropic-ratelimit-requests-reset:
+      - '2024-09-05T13:46:43Z'
+      anthropic-ratelimit-tokens-limit:
+      - '10000'
+      anthropic-ratelimit-tokens-remaining:
+      - '10000'
+      anthropic-ratelimit-tokens-reset:
+      - '2024-09-05T13:46:40Z'
+      request-id:
+      - req_01NrSCb7WmP9DgHRPswqwaRk
+      via:
+      - 1.1 google
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diff --git a/tests/test_tracer.py b/tests/test_tracer.py
index d32b205..1a439a1 100644
--- a/tests/test_tracer.py
+++ b/tests/test_tracer.py
@@ -2,6 +2,9 @@
 from ecologits import EcoLogits
 from ecologits.exceptions import EcoLogitsError
 
+from openai import OpenAI
+from anthropic import Anthropic
+
 
 @pytest.mark.skip(reason="Double init does not raise an error anymore, but we should test that it works correctly.")
 def test_double_init(tracer_init):
@@ -11,10 +14,7 @@ def test_double_init(tracer_init):
 
 @pytest.mark.skip(reason="Must implement un-instrument behavior first.")
 def test_init_openai_only():
-    from openai import OpenAI
-    from anthropic import Anthropic
-
-    EcoLogits.init("openai")
+    EcoLogits.init(providers=["openai"])
 
     openai_client = OpenAI()
     openai_response = openai_client.chat.completions.create(
@@ -32,3 +32,34 @@ def test_init_openai_only():
     )
     assert len(anthropic_response.content) > 0
     assert not hasattr(anthropic_response, "impacts")
+
+@pytest.mark.vcr
+def test_init_with_different_mixes():
+    client = Anthropic()
+
+    EcoLogits.init(electricity_mix_zone="FRA")
+    message_under_french_mix = client.messages.create(
+        max_tokens=1024,
+        messages=[
+            {
+                "role": "user",
+                "content": "Hello, Claude",
+            }
+        ],
+        model="claude-3-opus-20240229",
+    )
+
+    EcoLogits.init(electricity_mix_zone="BEL")
+    message_under_belgian_mix = client.messages.create(
+        max_tokens=1024,
+        messages=[
+            {
+                "role": "user",
+                "content": "Hello, Claude",
+            }
+        ],
+        model="claude-3-opus-20240229",
+    )
+
+    assert message_under_belgian_mix.impacts.energy.value.min != message_under_french_mix.impacts.energy.value.min
+    
\ No newline at end of file